I understand that the PCCs now have a can motor- is this true?
If so -is there a SKU or model number that will specifically apply to these updated products?
I believe they all retained the same product number.
Are you a factory rep or just another guy?
As a rule, Bachmann does not change product numbers on their products after updates/improvements. For example the Santa Fe 4-8-4 Northern has had the same product number since its introduction in 1972; the current PCC trolley will have the same product number for a particular road name it had when it was first produced. Makes buying on feeBay kind of like Forest Gump's Box of Chocolates: You may get a current production or you may get a 30 year old one - same number..
Actually the AT&SF Northern has changed product numbers, since its inception there have been at least 3 different product numbers but that is not very many considering it has been made for such a long time.