[Arran]

I think what he was getting at was replacing the Rola with some other brand speaker which for alot of guys would depreciate value.

http://www.radiomuseum.org/images/radio/...920069.jpg

I havent looked at the Rola's specifics but my guess is they can be found with some shopping

8" and 10" were used in lots of models so its a matter of finding the exact versions

http://www.radiomuseum.org/r/ozarka_v16.html

 I agree with that at least, yes reconing or exact replacement are the best options. That's a neat looking set, it sort of reminds me of the consoles offered by another famous Chicago manufacturer in those years.
Regards
Arran