You can buy kitchen furniture at the furniture factory for sure, but you may not be happy with the quality. I can tell you as a person who has bought furniture for customers hundreds of times and for myself of course. The best furniture is simply made by hand and made of solid wood. In fact, a great example of a quality Free Standing Kitchen Unit
https://www.murdochtroon.co.uk/freestanding-units/ from a bespoke furniture manufacture, they will make your kitchen furniture according to your ideas.