There are plenty of niche mechanical keyboard manufacturers. They even sell these kinds of keyboards as gaming keyboards now so it's not that niche. I got a Duc

There are plenty of niche mechanical keyboard manufacturers. They even sell these kinds of keyboards as gaming keyboards now so it's not that niche. I got a Ducky which is a Taiwanese company that makes hundreds of different variations of this type of keyboard. You can choose which Cherry switches you want and the length and pretty much anything you can imagine.