You would think living in the Lancaster, Pa area, 20 minutes from the TCA museum would be a mecca for tinplate. If it is, I haven't found it yet or perhaps someone could enlighten me. Cool Trains and Strasburg Train shop are the only two who have survived. B&E Junction in York was a good place to stop but is now closed for good.
York & Timonium, MD. shows, E-bay, OGR forum, train shop,occasional antique store find- pretty much in that order. The York show is a must for me- gotta stock up on parts and projects for the next six months till the next show!