Hello...I did find a Broan 12 inch for sale from a very nice lady named Amy Fitch...Here is her e-mail address:
"Amy Allen Fitch"
amy.allen.fitch@gmail.com
The only reason I did not buy it was that the people I was getting it for decide to redo the one end of the cabinet and put in a 15 inch!
Amy's unit was in good shape she sent me pics and still has it for sale as far as I know, feel free to contact her!
Thanks,
Larry