Originally Posted by daveb:
I think the place to start would be Q Car Company
http://www.qcarcompany.com/
I've seen their catalogs with similar trucks and trolley poles , also lots of other stuff that would be handy for building that model.......DaveB
Yes, primary source for just about everything is Q-Car!
NWSL may or not have the actual sideframes, etc - they used to use Q-car parts around their Magic Carpet drives, but I'm pretty sure that Q-car stopped selling parts for trucks and that everyone has to buy entire truck and power truck assemblies regardless what kind of drive is in it the truck now.
Make sure you very carefully specify prototype and weight, and whether you want these insulated or for overhead wire operations when you order them, too!