HI i need help can anyone tell me where i can get the mate for a Williams Santa Fe F-7 . I need the dummy unit . All that's on the box is Williams F-7 Thanks for the help. My email is fjp511@verizon,net .

I have a Williams F-3  PA six wheel engine and dummy unit the engine model is 6006. I believe the dummy unit is 6004.  I would like to know what B unit matches the engine and non powered dummy unit. The second question is what are the stock numbers for the passenger cars that would match the engine and b unit and dummy unit.  Where can they be purchased.

Thanks