Looking for string ferrules

[Cliff Kane]

I need to replace the small string ferrules/bushings on my six string maganatone (c. 1948, blues pearloid, same as Dickerson model). The strings pass through the body, and these are the small ferrules on the top of the guitar next to the bridge. The strings have gouged through the originals and into the wood below. I've checked some musical instrument parts sources, and have looked for a suitable retro-fit part, such as hollow rivets and eyelets, but can't find anything that works. Any suggestions?

Thanks, and happy holidays.

Cliff