If it is a Cessna audio panel many came without hookups for 2nd com,
makers, etc. I flew many C-152's with single com and Cessna audio panel.
The audio panel has switch holes for more radios, but no switches in
said holes. The PCB has spaces for relays, resistors, etc. but no components
installed.

That seems to be the case, however, I was told that it included marker
beacon indicators... All word of mouth/he-said-she-said, so I guess
going down that road is a lost cause (I've had the audio panel for
nearly a year now)

If, indeed, it is a Cessna audio panel, you can get another one from
Airwich Avionics. Or, you could toss it and get a better audio panel.

I checked out this site, and they didn't seem to have any audio panels.
Believe me... a new audio panel has crossed my mind, several times,
but I would be looking at a re-wire to accomodate the new audio panel,
and remove my intercom (since it would likely be built into a newer
audio panel). When all is said and done, I would probably be looking
at $1500 -$2000 (just a guess). If I can get away with what I've got,
and potentially get away with a ~$20 relay fix, I would be happy with
that, until I can really afford to go in and upgrade the entire panel.

Thanks for the input!
Todd