The Lexus axle has Toyota hubs that wold need to mate to the VW trailing arms. And I've become disillusioned with the open differential. A Torsen diff would be a big plus.
OTOH I know people at Arcimoto and I've asked them if I could just get a complete FUV drive train and suspension, turn it around and mate it to the VW frame horns. That would give twin motors and torque vectoring. The part would cost 60% of the MSRP, but I might have a better chance of getting someone else to help.
They use the same 145R-15 on 4x100 PCI, the same as the Beetle. There would be zero weight overhanging the reart axle line, but the front axle would be moved forward 8" using an aluminum dune buggy part. 3" longer and wider rear trailing arms.
Something like this:
That angle doesn't show the boat tail.