Custom Power Supply for 6v DC Motor

Acopian is a specialist in quality power supplies. They have a lot of choices. An appropriate Gold Box model would very probably cost less than you say you're ready to pay.

tobias, Those are very nice supplies. They make AC input 6VDC supplies with up to 40A output! OP should look to find power requirements of his motor (will be in watts, W). Then figure out the current demand by dividing the power in W by 6. Based on P (in Watts) = current (in Amperes) X voltage. Take that number and add a safety margin of 1.5X or 2X, and you are good to go with one of those Acopian supplies. Or a battery.

Awesome info! Thanks!

My very humble experience in upgrading power supplies and connections suggests that it would be wrong to neglect the quality of the cable which connects the PS to the equipment.

For example, a shielded and (perhaps I should blush here, it does seem like overkill) cryo-treated cable sounded as clean as a 12V battery when used to connect an overbuilt regulated supply to my Apogee Mini-DAC. In comparison, a cable made up of scrap Radio Shack 18ga speaker wire and the same connectors sounded gritty and edgy.

Tobias, It's terrible when experience teaches us that there is indeed no free lunch.