Bowser still lists some steam loco parts, including 62 inch drivers, a rivet tool, and I think I saw some rivets. Here is a link to those items: http://www.bowser-trains.com/docs/Prices/Bowser%20HO%20N%20Prices.htm
https://greenwayproducts.com/index.php Scroll down to 2nd menu.
Jay
C-415 Build: https://imageshack.com/a/tShC/1
Other builds: https://imageshack.com/my/albums
Try Precision Scale. They should have most, if not all, of what you need.
I remember that 4-6-0. I saw it in person shortly after the articles came out. Nice loco, but it had one of the worst paint jobs that I've ever seen. Well, that and the NC&StL F's a few years later....
Chuck - Modeling in HO scale and anything narrow gauge
Swedish Custom painter and model maker. My Website:
My Railroad
My Youtube:
Graff´s channel
Not off hand. Try the big Walther's catalog, try magazine advertisements, try Google, try some train shows, you might find a junker steam locomotive with the right size drivers and other parts. Valve gear rivets ought to be around, made for other purposes. Try googling on just plain rivet, or "rivet 1/16 inch"
David Starr www.newsnorthwoods.blogspot.com