Are there, um, I don't know how to describe it, are 'distinguishable' keys, in the locating sense, a thing? Something along the lines of keys specifically for WASD that have a different textured surface, or quaint rubber lips or whatever. I've seen plenty of examples of replacement coloured keys for WASD and whatnot, but pfft at those.
Or, another way of asking, say I wanted to get a new keyboard, mechanical, BUT, my left hand gets lost a lot when moving around keyboards and I want one that tells my sense of touch yes, that's right, those are the WASD keys! without my body having to involve any eyeballs and stuff --- do such cripple-aids exist?