No need. You can buy ALL of the parts off the shelf for a 3D printer and assemble it yourself. None are regulated (Aluminum rails, motors, arduino controllers, LCD panels, Power supplies, heating elements, thermistors, wiring). Strictly speaking there’s nothing about a non-resin 3d Printer you can’t procure and build yourself. And you can even 3d Print the housings to make it look nice once you’ve assembled it. Oh… and the designs and parts are largely open source.