I know most around here build their own, but if somebody's looking for a completed machine......here ya go!
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=200707560787&ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=200707560787&ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649