I got an old lionel 1664 loco from my brother-in-law and it needs the little plastic plug that fits into the hole so the headlight can shine through it. I dont know what the heck you call it? It looks like an old light brite plug. Any ideas on what it is called? I have used all kinds of searches on E-Bay to find it but I guess you need to know what the darn thing is called first[:D]
I believe it’s called a headlight lens.
You might try Olsen’s Toy Train Parts at 216-226-0444. They have a lot of parts available and this piece would benefit from their nice “send a self addressed stamped envelope and the $$ and we’ll just mail the part to you” policy. This works great for those small parts.
Jim