Athearn sells replacement motors. Go to their web site and click on the PARTS link near the top after selecting your scale.
http://www.athearn.com
I've purchased a few on Ebay from this person for all of my C44/AC4400's with Hex Drive in the past and no complaints; here's the link.
http://cgi.ebay.com/NEW-ATHEARN-HO-MOTOR-FLYWHEELS-DCC-READY-DASH-9-AC-4400_W0QQitemZ150555090876QQcategoryZ19130QQcmdZViewItemQQ
A-Line makes some motor repowering motors for Athearn Loco's
Look here http://www.ppw-aline.com/re-power.htm
Hey guys,
I'm looking for some replacement motors for 3 old blue box locomotives that I have just received. I just need to know where to find them and how much they are. And as for what they are, its 1 C44-9W and 2 AC4400CWs.
Thanks,
Mike