Here is the synthesis of all the locations posted for ease of reading. Great if the admins can make this a sticky post (I will keep updating it from time to time).
- South America
- Brazil
- Natal and Recife in Brazil. Sea, O2, Sorb, Trimix, various profiles, tech guides, and, in Recife, wrecks.
- Mina da passagem, in Mariana, total facilities, a flodded 18th century gold mine with various profiles. The dive center owner recently released it's own designed front mount CCR called Smart rebreather, with IANTD training
- Subaquatica in Sorocaba Brazil, wich i am associated through Inspiration Brasil, who, although not in a touristice destination, can arrange pretty anything needed for CCR trips
- Asia
- Chuuk or Bikini with Dirty Dozen and Master Liveaboards checks off everything on the list including the DPV.
- Rangiroa: CCR rangiroa is a great shop in a remote AF location. O2 fills, sorb, tech guides, endless sharks and visibility.
- Egypt
- Sharm el Sheikh with Emperor Divers as basis for all local, Ras Mohammed and Tiran diving
- Dahab for the blue hole
- Central America
- Mexico
- Socorro. I also had a great time diving with Nautilus at Socorro. Easy to get fills. They gave me a keg of sorb which easily lasted the trip. Got much closer to the mantas and had better profiles than the divers on nitrox.
- Europe
- Malta
- Croatia
- Vis island. Every dive center in Komiža has sorb and helium, along with standard bailouts rental and 3l tanks.
Most of the let you do you own thing for tec dives, but there is always a guide in the water.
Dive positions go from 0m reefs to 130m deep wrekcs, and everything in between.
- UK
- Scapa Flow. Pretty much all of the boats will rent you 3l cylinders, lead, stages and sell lime. Great wrecks, and stuff out of the flow around the islands available too. We tend to dive off the Clasina and Bob will help with lazy shot or trapeze etc as needed for bigger diving. Also got to consider Malin Head well set up for ccrs there.
I would add Indonesia, Thailand, China, Philippines, to your Asia list.
Some amazing diving to be had and lots of rebreather friendly centers that can set you up.
Indonesia:
Bali Dive Trek - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Tekdeep - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Dark Horizon Diving - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks
Trawangan Dive - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Manta Dive - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Blue Marlin Dive - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks
Sulawesi Dive Trek - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks (limited but if you give him a head up he can organize more from his partner)
Thailand:
Blue Label - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Koh Tao Tec Divers - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks
China:
Blue Flag International - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks
Guangzhou Hailang Watersports Ltd. Co - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Legend Diving Center - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Philippines:
Oceanplayer - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Blue Lagoon - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
Dauin Tech - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
There are also a small handful of freelance guides that do cave expeditions that have local connections to get O2, He, boosters, sorb, tanks. At the moment the only one that comes to mind is Por Parasu but if your really interested I can ask around for more contacts.
And of course for Mexico you forgot the huge plethora of centers in Tulum. Personally I like Cave CCR dive center (little bit more lower key and not as much of a "Mexico dive factory") - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's
And I see you listed Dahab already but my go to dive center there is Lagona Divers (Formally Team Blue Immersion) - 200B O2 fills, Helium , Sorb, air fills, guides, CCR tanks, DPV's (they can organize them)