Jeff the Train Tender carries some parts. Prewar is mostly O three rail and some HO. I could not find any information at myflyer.org They start at 1939. I did clean one engine and remembered that the reverse unit need a special fingered plate no found in postwar.
After restrictions are released it would be time to visit some train shows and establish some contacts
All I got is a small price guide.
WIde Gage is the AF counterpart to Lionel Standard Gage.