I think it was traintender.com I got some parts for one of my GP20s. I just tried that site and it showed some advertisement for a bunch of sites. Next part I need is a power pickup for the trailing non powered truck in my 81 GP9 8158 which has the big pullmore motor.
If you are looking for other parts dealers, try these sites:
www.ttender.com is train tender web site it worked fine for me this am I’m at work now and we have a lot of filters that won’t let out on to some sites.
ttender.com is it. I remembered it was Jeff I talked to there.