I'm going over to Detroit on Friday. If there is enough interested, I can bring back some can's of R134a with me.
It will be the one sold by Advanced Auto Parts, Interdynamics brand, that contains the stop leak. Each can is 368g (13oz). If your system is completly empty, 3 cans should fill it. If the pressure is low, 2 cans are usually enough. Part Source sells the fill hose, but if needed I can pick up a couple of them too. The cost is $20CDN/can.
I still have about 8 cans left from the case I bought a month ago, but I want to keep a few for myself. If there is enough interested, I will get another case on Friday.