If there are any junkyards in your area, you can look at any Mk3 cars for the same a/c compressor.
late 90's Jetta's have pretty much the same parts in them. I know theres a jetta in a local jy with the a/c compressor on it. almost bought it myself when fixing my cabrio but i decided that was one thing that should be new.
Also there is a vw classified forum..where this probably should be posted.