This may or may not be an option or to the liking of the OP and is kind of a long shot, how about a shell swap with a older Williams EP-5 that already has can motors? If it does work, you'd have a Williams running gear, MPC shell, and an electronics package of your choosing.
I don't know if this is even possible between Williams and MPC (I've done it with a couple of GP shells which worked out well). Someone who has both would need to check for compatibility.
