http://cgi.ebay.com/ebaymotors/GMC-C...item25648c663e
http://cgi.ebay.com/ebaymotors/CHEVY...item4aabd678eb
http://cgi.ebay.com/ebaymotors/4L80E...item3ca78aa498
just a few i found in 10 seconds..lots more on there and some are actually a great deal compared what a tranny shop would take to rebuild one !!!