The artist is Jay Laber. A google image search will turn up many more great ones.
(http://i301.photobucket.com/albums/nn48/kxxr/partsman5.jpg)
(http://i301.photobucket.com/albums/nn48/kxxr/partsman3.jpg)
(http://i301.photobucket.com/albums/nn48/kxxr/partsman2.jpg)
(http://i301.photobucket.com/albums/nn48/kxxr/partsman3.jpg)
(http://i301.photobucket.com/albums/nn48/kxxr/partsman7.jpg)
(http://i301.photobucket.com/albums/nn48/kxxr/partsman8.jpg)
I guess I should have kept every old part that I threw away or recycled!