I've got an '01 M750 short-case (no pistons, barrels, heads) without side covers with 11,500 miles on it if you're interested. You would have to put your parts on it so new gaskets and such. Motor was out of a wreck and it ran afterwards. It has the same 12mm engine mounting bolts but you would have to swap your timing gears to pick-up the EFI sensor.
$250 + crating & shipping from 91335 zip if you're interested. I also have a bill of sale from the original owner.
you have PM..