Seeking 1940s Oahu guitar amp

Does anyone here know anybody (preferably in Southern California) who owns a vintage 1940s OAHU guitar amp of this type?:

It does not have to be in working condition. I am looking for one as a loan for a museum exhibition on Tiki culture next year (as an example for the Pre-Tiiki Hawaiian music craze).

The ones on sale on e-bay and the internet are all refurbished and around 400.00 bucks and up, a little hefty for me as a non-musician....

I have an Oahu amp similar to this one:

Which museum is this? I'm up in Ventura County. Feel free to hit me with a PM

I have this one, Sven: