Wow! I want to do that route!
That is mostly a local diver/club member thing. Making that route with a visitor to the islands that has no Hawaii diving experience can be a bit of a challenge. It is pretty awesome though. We also have a pretty large contingent of extended range divers, mostly on rebreathers, that like to do this kind of thing on scooters. DJ has scooters for rent and we can hook you up there.
For actual technical dive sites that is all private charter and bare boat. But we usually only charge $50 per person as you are guiding yourselves or hooked up with a local technical diver that is dragging you along because he/she wants to go too.
Some dive sites not mentioned
Friendship wreck 190fsw - from Kewalo
Tong's Wall 130-200fsw - from Kewalo
Shark's wall - 180-240fsw from Waianae
Eyes of God - 120-160 fsw from Waianae
Secret Garden - 110-160 fse from Hawaii Kai
Split Rock 120-150fsw from Hawaii Kai
Coal Barge 300fsw from Kewalo
If you get in touch with me I can put you in touch with the guys that are technical diving that I trust to be safe. You can take it from there and I'll schedule the boats, may even join you. Be aware that it is really unlikely that any of them are going to do a real tech dive with you until you've dove with them at least once on one of our recreational charters - as it should be IMO. If we can't fit your schedule I can recommend Ray from Cause Ruckus. He will take you too the Kewalo sites. Honolulu Scuba Company is where you get sorb, trimix, 02, stage bottles, rebreather bottles etc. We'll rent, fill all that to you with the proper certs. Prices are reasonable and access is 7am to 7pm daily.
Edit: I see you have scooter. Good start. PS you can scooter to Sea Tiger with a decent one. My P1 just barely make it there and back, but it has the advantage of being free, shouldn't be to hard to get someone to do it with you. Rebreather bottom time on that one though...