If you are looking at 15" cars also consider K-line. They did 6 cars with interiors and figures. They are the same size as their scale 21" cars save for length. Also for a B units you can use any TMCC one from Train, 16, 17, 18, or 19. They are essentially the same except for the little train number in a corner. I am mixing Train 18 and 19 power.
http://www.legacykline.com/app...mp;p_oem_sku=K-4630B
Pete
