I ordered my T64s from Robotmarketplace. Took around 3 to 4 weeks to arrive. In the new series, carbide, nuts, sabretooth and my machine PP3D all run them. Nice all in one units and you can also get wheels that will bolt straight on in 10, 12 and 14 inch sizes.

Same motors all around is a nice idea but chances are the motors you need for drive will have different characteristics from those you need for the pump mechanism.