On Sun, 18 Dec 2016, Todd Goodman wrote:
I have AT2XTKBD bare boards available for $5 each that
were designed at
vintage-computer.com forums with the help of our very own Chuck Guzis.
https://retrobrewcomputers.org/doku.php?id=boards:other:at2xtkbd:start
Wonderful!
THAT is the answer, if you don't already have an 83 key F.