really small AC compressor

[dusterbd13]

anyone know what the smallest AC compressor i can find is? id like to do a low mount in my duster, down where the fuel pump used to be.
ive looked at all the sanden coversion kits, but they all mount them at the top center of the engine.

this is a small block 70 k-frame car.

id also prefer it to be a factory compressor off of something, so that way i can find replacements down the road. ill fab my own brackets, hoses, etc for this.

thanks for any help

Michael