I found out that these things crack when they get old, at least if they're made of plastic like the ones on my Bianchi are. My LBS had one Shimano piece, but they'll be going on a nine speed Campy Veloce crankset, so I'd like to keep it in the family, so to speak. I don't need über-expensive blingy things, just a set that looks right on a '90s Bianchi.

Thanks!

Loose screws is great for any small parts you might be missing.
https://www.loosescrews.com/index.cgi...d=936769410749

If you absolutely must have campy dust caps, you can find 'em on ebay, but you'll pay a premium.