Need help with A/C

Okay, so my mechanic says I need a new compressor and I was wondering are they all the same, like will a 92 civic or newer compressor go into my car? Cause I see pleanty of those on ebay but not a lot of 88-91 compressors.

Thanks
-- Melt

Oh, and read my rant about this bullshit
http://www.automotiveforums.com/vbulletin/t61087-2.html

I'm in the same situation - we tried installing one from a Prelude but it did not fit....

???