welcome to the world of midship amusement
hope you find a beat soon if you are anywhere near kyushu i have a few contacts there who may be able to help
the main problem that seems to be with air con is lack of use/ maintanence and probably running on the old gas so the compressor siezes up not before throwing of the odd fan belt
are there any other common problems on a beat !!! well thats a can of worms you may have just opened to name but a few
distributor siezes up can cause no end of problems
timing belt failure
ecu faults (check if yellow light comes on and goes out )
eratic speedo /gauges
calipers sticking
vinyl roof shrinking splitting
i will stop now before gavin gets upset as i think he has experienced most of above
oh yes 1 more the inability to remove the chesshire cat grin off your face as you exit the drivers door
good luck in finding one
mikei