It seems like there aren't a lot of "commercial" offerings. Of small-scale/hobby projects, there was the GH-122, a long-passed project, and I think there was a

It seems like there aren't a lot of "commercial" offerings. Of small-scale/hobby projects, there was the GH-122, a long-passed project, and I think there was a board called the "Boston" in the 120% size class. For commercial choices, the common examples are 122-key boards from Unicomp and other firms servicing the terminal market, and programmable POS boards like the Cherry G80-8113 and 8200 series. The old Northgate Omnikeys sometimes added an extra bank of a dozen function keys, and some models had interesting takes on the navigation cluster. I know some people have used the Tipro modular/POS boards which can be daisy chained to the order of several hundred keys. I personally ended up designing a custom PCB for a 130% board (normal 104 + an extra 10 keys on the left, in the IBM XT style, and an extra copy of the function row)