If you try antique stores or flea markets, you'll have better luck in small towns. In towns of any size to speak of, interesting instruments are often sold for their decorative value, and I have rarely met a non-specialty dealer that could tell the difference between "mint" condition and "not worth fixing". Good luck to you and me. I once saw an accordian I really wanted bolted to the wall of a "Chili's" restaurant in Montgomery, Alabama.

best holiday wishes, Chet W.