[dino velvet]

They go to some butterfly dampers on some older circular ceiling diffusers. I am missing a few and having a p.i.t.a. time finding some replacement ones. I found a thread on another forum where someone was looking for the same exact ones I am needing, but the was no mention of finding them.

Anyway, I borrowed the photo from that thread as its pretty good. I know I'm not the only one needing these!

Thanks

 

[ZZZZZ]

These guys have all sorts of odds & ends knobs. Don't know about yours specifically.

http://myknobs.com

Otherwise, check an architectural salvage yard in a big city near you.

 

[ChuckF.]

Those look like channel-switching knobs from old TV's, before everyone had remotes. A really-old TV repair shop might have something that works, if you don't mind them numbered from 1 to 13.

 

[SeniorSitizen]

I'd probably make them from a piece of oak. Possibly easier and quicker than attempting to locate them to purchase.