It's a shame that trackpoints never caught on outside of the thinkpad crowd. I rarely see them get used for custom keyboards, even though they are IMO the perfect fit for a use case like this.
Also available with up to two trackballs or touchpads.
Will try this out, if its still possible to buy
I would definitely prefer their trackpoint module be "flipped upside down" so the nub was on top, directly next to the H key, so I could move "just the index finger", and not my palm, but it's really not a big deal now that I'm used to it.
They seem to get this feedback a lot, b/c they have an FAQ entry about (nub location), which asserts the current thumb location is due to space/engineering constraints. But, dunno, I kinda wonder if that was for the smaller UHK60? B/c just looking at my UHK80, it really seems like the nub could be by the H if they wanted it to. :-)
So not "perfect perfect" but still really amazing imo, and so glad I switched over -- I'm like 10 years late to split keyboards, custom layers for movement / programming binds, everything the cool kids have been doing forever, but I couldn't give up a trackpoint. But here we are, finally! :-)
(Also fwiw I held off on the UHK80 for about a year b/c they were having firmware issues on initial release, repeated/missed keys, that sort of thing, but its been rock solid for me; literally zero issues.)
TEX had a whole line https://tex.com.tw/products/shura
The classic Happy Hackers Keyboard has one. https://hhkeyboard.us/hhkb-studio/product
And Lenovo itself offers several usb keyboards with TrackPoint https://www.amazon.com/dp/B00F3U4TQS
(Previously, the keyboard, durability, and repairability were also ThinkPad selling points for enthusiasts.)
The durability is mediocre, and repairability is only better than an iPhone.