Take a look at the site above. The guy has a bunch of very nice button boxes for sale in several different tuning combinations, some two rows, some three rows. The Hohner pre-Corso has three reeds and would be good for Cajun or Conjunto. Everything is in excellent tuned condition. He is in Elgin, Texas, just 20 minutes out of Austin. He also does guitar restoration. I bought the Paolo Soprani.