What sort of company would I contact to have something like this made? I am looking to have made a Variable DC power supply capable of outputting up to 300-400 amps and up to 30v(and as little as well below 1 into the decimal region). Preferably as small as possible. My only requirements for it are to have both ampherage and voltage adjustable by their own course and fine adjustment knobs, as well as digital screens displaying the current Voltage, Current, as well as the current resistance of the circuit. Output holes for anode, cathode, ground, etc. I need the device being capable of running without deterioration for up to 15-20 hours aday everyday. I don't mean to advertise this here, but does anybody know where I can have something like this made? Money is not an object. Willing to pay $,$$$+. I was unable to find any freelance people in the area and I'm not sure what sort of company can do things like this. The idea seems plausible enough I just don't have enough EE knowledge on my own to build one reliably.