My Charger is a factory A/C car. I bought a kit from Classic Auto Air to change over to the Sanden compressor. The kit included the compressor with clutch/pulleys installed, mounting brackets, and hoses. I had to trim and have one end of the hoses swedged locally. It was around $550.
The compressor mounts with a plate at the front of the compressor and a small bracket at the tail end. Something was wrong with the parts I received. I could bolt the plate to the engine, the compressor to the plate, then the aft bracket would not fit. It was off by a mile. I called CAA and they sent a different style aft bracket. It didn't fit either. I called back and they were not much help really. I ended up fabricating a bracket for the tail end of the compressor. It looks good now and works great.
If your car is not a factory A/C car, I would recommend checking out Vintage Air. Heck I would recommend Vintage Air even if your car is a factory A/C car. ha