The same guy I got my engine from has one for sale on eBay. It's a 1994 993, which is a nice engine for under $5 grand. I can't vouch for the guy completely (he's got some negative feedback on eBay), but my experience with him was just fine.
http://cgi.ebay.com/ebaymotors/aw-cgi/eBayISAPI.dll?ViewItem&item=548936698&r=0&t=0&showTutorial=0&ed=981055246&indexURL=0&rd=1
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Jack Olsen
1973 911 T (3.6) sunroof coupe
jackolsen@mediaone.net