Old ADF and XPNDR parts

Most of my panel is newer King stuff, except for the ARC ADF and Cessna 300
transponder. The ADF and XPNDR kind of 'stand out' because they have the
yellowish colored faceplates. So I thought it would be nice to find the
black colored faceplates for both, so they match the other radios.

I've looked on ebay, are there any other sources for those faceplates?

I know, it'd be nice to just get a new transponder, and ditch the ADF, but
we just spent most of our reserve on a new encoder, and DG. TIA,

--
Ben
C-172 - N13258 @ 87Y