Are you asking whether there is a combined octo-inflator that is self-serviceable? I'm sure they all are, but to my knowledge, no one who makes one makes the parts readily available to the consumer...
Maybe. Maybe not. I guess the operative phrases are "readily available" & "to the consumer". I think if he has his heart set on an alternate air device, he can find the service parts.
The alt air device that AWAP linked to is made by ODS in Taiwan. It's private labeled and sold under the names:
- Dive Rite
- Blue Reef (leisurepro)
- H2Odyssey
- Storm (Dolphin Scuba Center)
- and probably numerous more
Not long ago, Dive Gear Express had service kits listed on their site (for the 'Rite Source'). Maybe they still have them but they are not listed (?). The OP could call DiveGearExpress. Or call H2Odyssey in Vista CA (they are in the same building as ODS in California - imagine that!)
I've got the one branded 'H2Odyssey' on my Zeagle Express Tech BC. (I've owned a number of the Aqua Lung alternate air devices). The device made by ODS works OK.
My complaints with the ODS made device:
The threads in both the collar (where it attaches to the BC fitting) and threads in the metal ring that hold the purge in place kinda sloppy work. When I disassemble and re-assemble everything, I have to go very very slow with the threaded parts to avoid cross threading.
Kind of surprising. I suspect ODS is making a number of things for Zeagle (when I bought one of my Zeagle regs, it came with an LP hose with the ODS name on it!). On the other-hand, when I disassemble and reassemble my Zeagle brand power inflator, the threaded parts are much smoother than those of the the H2Odyssey alt air. I'm guessing that when a company is building their own brand name, they ride the manufacturer to ensure the quality of the parts. The HOG regulators are made by ODS Rich makes a point of explaining how his stuff is built to a higher standard than the ODS football items.