When i first got my Sapphire 4x4 with factory air con, it had the old type r12 which wasnt working.
So i had it all changed to run R134 at great cost, and to be honest it wasnt really worth it
Although it delivers cool air, i wouldnt say its cold air like some other air con controlled cars ive been in.
So in short, no legit place will put R134 into a R12 system.
Cue someone else to say 'oh yes they will'