

I suggest that you should spend less effort looking for special hardware and more effort learning how keyboard mappings work in your OS (e.g. [1][2]). “Linux” is a very powerful chameleon because hardware vendors almost never cater directly to that market.
[1] https://linuxconfig.org/reprogram-keyboard-keys-with-xmodmap [2] https://github.com/xremap/xremap
Can’t really help much there… I haven’t bought a keyboard in years. But once you drop that first qualifier the availability of options just goes bananas!