Hey Tommy, I found these that are sorta close.
http://www.lynxmotion.com/p-580-plan...4mm-shaft.aspx
Oddball gear motors of all kinds can easily be found by ebay from china or overseas. Watch out for shipping. Search around for more of these and you may find something better. Here's some examples.
http://www.ebay.com/itm/Mini-Micro-D...item4ab91a3543
http://www.ebay.com/itm/12V-DC-100RP...21130900521%26
-Jeff