While the brackets fabricated from cut plates are great, I don't see the need for it in this case. Wouldn't two simple tubes (one straight across the top and one vee-shaped under the bottom) and some plain plate gussets work?
The system which mounts the front of the stock transaxle to the radiator support element of the body makes sense, but it's probably not supporting the weight of the powertrain, just resisting drive torque. The front mount of the Tesla drive unit supports about half of the unit's weight, all of the time. I'm not sure that this is where the load should go.
If you're only bending one tube (for any bracket), it might make more sense to pay a shop to do it than to buy equipment. If buying something, the cheap pipe benders (assume something like this) are great if they work for you... but they are notoriously poor for smoothly bending structural tubing. By coincidence, this just came up in another thread.
