Unfortunately Suboxone is going to be a difficult one to get (it is mostly all the sub-lingual strips now, at least they are pushing for that), as doctors are becoming increasingly wary of the problem of "diversion." It's a shame they (the gov., at least in the U.S.) require you to come monthly to pick up a prescription, as often the visit is more expensive than the medication for those without insurance (not to mention inconvenient). I haven't seen anything, beyond what has been mentioned, as far as IOP source, but I will post if I do.
Also yes, the 4mg and 12mg often require a special order from the pharmacy (though the 8mg are almost always in stock),
(Chupacobra, shoot me a pm if you can, thanks).