Also have a look at www.eastwestsamples.com As far as VST's of real world instruments go they have a huge selection and the quality is pretty damn good. Might have what you are looking for.
THIS one sounds pretty good....not really churchy though. It's a soundfont and it's compressed in the sfark format. You'll need sfark to decompress it and a soundfont player to use it (sfz works well). I doubt you'll find a better sounding free solution.