pretty much any napa or general automotive shop can get virtually all of the components you need. there used to be 3 or 4 major a/c aftermarket lines such as red dot, blue streak, eskimo, etc. ask the best counterman for advice, and hopefully they may even have some old catalogs with the pics still kicking around. it was always humorous to me when an aquaintance who was kind of snobbish about his Jag needed the a/c fixed. he had spent over a thousand at the dealership and all they did was loosen the belt so the compressor and clutch did not burn out , the real issue was the thermostatic switch, they eventually sold him a new a/c compressor for a whole buch more. when i told him i could get that for 20% of what he paid, he called me a liar and that it would not be a Jag part... hahahaha it was available from the napa store a block from his house, and for a lot less, and with a warranty. imagine that. anyone who has had a/c experience can help you out, but they do need to have their poop in a pile and understand the system. those were basic systems with simple controls and reasonably reliable. for the most part you will need to know the style of compressor and the fitting sizes, new hoses that do not leak, a thermostatic switch and expansion valve renewed, the proper clutch and pulley style. if the condensor and evaporator are useable they can be flushed and reused, it takes some work, but it is not too difficult.