pigmaster

A while back I pulled out my engine on my 91 legacy. To make it easier, we emptied the AC line (very little left in it), and removed the compressor completely. Since I wouldn't easily be able to recharge the line I never put the compressor back on. Now that it is blazing hot, and I'm living in a busier place so I'm stopped more often so I don't get the advantage of windflow, I'm wanting to put AC back in my car. I still have access to the original compressor that came off, but I hear I need to get a 'kit' to upgrade it to support r-410A (?) since the original stuff that came out is now an enviromental hazzard. What would be the easiest way to go about getting AC back on this? Is it possible to get a compressor from a new legacy and charge that? Or could I put the original back on and try and find a shop around town that would recharge it? Or should I find this kit and install it? Thanks!