Dare say just an o-ring replacement.
 
Just dont know is anyone still filling up with the old refrigerant ?

It was old style gas used. Hopefully wasn't just the O ring. I don't think the a/c had pushed out any cold air in quite a while, car wasn't treated quite the way it is now by the previous owner. It's a bit like an abused dog from the rescue home.

Mine was leaking the same and my mech just put 'Leak Guard' in it and it stopped it leaking and has been freezing cold for over a year now. Not saying it will work on yours but it saved me hundreds. A/c compressor stayed right where it is!

I've swapped compressors on my 92 Turbo. Did it on jack stands at home.

I thought the old style gas was superseded because of medical/environmental risks?

zmit

I've swapped compressors on my 92 Turbo. Did it on jack stands at home.

I thought the old style gas was superseded because of medical/environmental risks?

 
The old gas was banned due to environmental reasons, it was harmless to us except for the holes in the ozone it helped create. The new gas on the other hand is carcinogenic, apparently. 
 
Just thought i'd finally update, replaced compressor with new one, all seals changed and regassed.
 
I should let the installer know his install isn't cool, its freaken freezing. Its like numbingly cold, thats on half a/c and low speed.