On board air using sanden compressor and a/c?

im looking at going with a sanden on board air setup but i want to keep my a/c. i thought i had seen a company or somebody that had done this but searching reveals nothing. anyone seen it done or done it? how would one mount two compressors?

Try this post...

http://www.naxja.org/forum/showthread.php?t=67384

It's an old post with the pictures now missing, but it covers pretty much what you are after. Some of the other posts have other links as well...