A/C compressor help

[Paul D]

Help! I’m replacing my 1990 535i compressor and I’m having problems mating it up to the lines. My connections have the orifice surrounded with an annular grove that contains the sealing O-ring. The fittings are flanged and held in place with two allen head cap screws. It looks like the new unit is designed to have a cylindrical protrusion from the fitting going into the housing, the o-ring on the fitting. Additionally the compressor has two inlets and two outlets (to my one each), is there a 2-1 adaptor? Does anybody have a source for the fittings? I purchased the new compressor from BMA p/n 64 52 8 385 712. It is not the OEM unit but aftermarket. A rebuilt OEM is going for $700, while this one sold for a mere $390!!! Patrick at BMA is still doing some research but I thought I’d canvas the board as well. TIA Paul