id love for something other than the tex yoda to win this. the IBM keyboards are really quite fantastic and come with pretty much none of the yoda's drawbacks.
I was thinking of this too. I found this and still had open so for you
https://m.intl.taobao.com/detail/detail.html?id=19702143286#
Perhaps this will help you. Inexpensive even once you find an adapter. I'm not sure if it is buckling spring. But I found by googling the second option for a bit
I want more keys then Tex Yoda. . If it is programmable less keys can be made up for somewhat depending on user. Tex Yoda is nice for being a kit you can choose your own switches. I think I saw they almost made a Bluetooth option too.