We were on bikes this summer, so didn't really look out for LPG either. But I do remember spotting at least a few places that sold it.
As for advise: keep an eye open for the police. In Georgia they are very correct and only seem to pull people over for not wearing seat belts. I've seen many people run red lights and speed through city centers in front of cops and they didn't even blink. But they seemed to be like flies on honey when they spotted someone not wearing the seat belt.
In Armenia they'll pull you over for whatever reason they can make up on the spot.
And you probably already know this, but just to be sure: you cannot cross between Armenia and Azerbaijan directly, you'll have to go around via Georgia. Nor can you cross between Turkey and Armenia directly.
|