Thought I had this bookmarked. I believe it was in the past couple of years, there had been a discussion of supplier for small screws. Specifically 00-90 brass. The supplier noted in that topic sold in quantities, which were very inexpensive. Does anyone recall this thread?
Might be this thread: https://www.trainboard.com/highball/index.php?threads/0-90-size-screw-source.85990/ Micro-Mark does have them, researched it this weekend in the print catalog, but just one quantity and price. Micro-Trains also sells a package of 24 00-90 x 5/16" screws: https://www.micro-trains.com/index....&search=00-90&description=true&product_id=345
BTW, to search forums i use google's site-specific syntax. Just put "site:trainboard.com" in the search box along with your search terms, for this one it was "site:trainboard.com 00-90"