Long day, but got a lot done. Welder did exactly as I instructed, results were not exactly what I anticipated.
Not a lot was needed to make the shifter work, I simply cut a spare shifter, drilled the arm and rotated it 90 degrees, re-shaped the actuator arm a bit and...

The brake side took considerably more work. I tried to trim and hollow out the OEM footpeg spacer block, but ended up having to completely cuto off the lower 2/3 of the block leaving only the upper two mounting holes and the new rearset mounting lug. I then trimmed the cut-off section to retain only the section that the mounting bolt runs through, to use as a spacer/support for the third bolt. The reason for all this was the spacing needed for the brake pedal to clear the kickstarter, required flipping the aluminum mount spacer "inside out"-

My plans to use the brake pedal as-is were foiled, as the curvature around the master cylinder is perfect, but the arc needed to allow the proper range of motion needs to be reworked with another 3" section added.
Also, the Kawasaki kit left only a very short section of threaded shaft, and a much-too-small yoke for the brake pivot clevis. That will all be replaced with a new assembly similar to the one mocked up in the photo, but made with a spare OEM pivot clevis that I had on the shelf.
There, dave; are you satisfied?