Bobcat:
I played with a couple korean mandolins (and a guitar) that were positively infested with inlay (fish, unicorn) not too long ago..I don't remember the name and I don't know what "double chamber" means.

These had a BIG 'woody' sound, A-style, kind of big, flat bodies.
If this sounds like a fairly accurate description, I can check the name and willingness to sell..if your friend is still shopping.

Melissa