If you are going to York there are at least 3 places I can think of.....
Purple Hall: Neely’s Train Shop......huge number of “junk boxes” to rifle through..... you could get lucky.....
Orange Hall:
East Coast Collectibles......near the southeast corner of the Hall
....and then another one at the northeast corner of the Hall.....sorry, I cannot remember the name.....
Both vendors have loads of Plasticville, both kits and parts for sale.
Peter