Weird bit of trivia. One of the older IKEA dressers (from a couple of years ago) had bearings in the roller arms that are the exact, same size BBs as the one that KSC uses for their hopup BB.
If you drop by your local IKEA in the service/parts department you might be able to find a set of those slider/roller arms with the BBs if you take it apart for about $5/set or so iirc.
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