It should be straight-forward for any decent air con place to mate up your standard RA23 air con bits under the glove box with the SRr20 compressor, and plumb in a condensor and 'bottle' at the front of the engine bay.
Hit the yellow pages mate.
Mitch.
basically remove the whole system from a ra40 celica...most of it fits straight on and just needs a few new holes for the condensor to fit...then get new tx valve, reciever dryer and orings all through the system, a good flush then gas it up..