If you have one of the 12v motor belt driven pump set ups and want a better motor that will turn a couple hundred rpm more my company sells these that we use in our centrifuges. They are way better than the smaller 12v motors used in the kit. We do have those also but they would cost more from us I would expect. Here is the better one we sell.
https://www.wlwalker.com/Product-Det...productId=3056