Here's a special keyboard for sale on Ebay: http://www.ebay.com/itm/Fingerworks-Cus ... 1405175544
This product seems familiar! Minox(one of our site members) is building these beauties -- and apparently one of them is now being sold (or re-sold).
I also added this to my Ebay spreadsheet.
(As usual, I have absolutely no affiliation. I just have an active search agent and share the results here.)