I ended up getting the hurst shifter from US fleabay.
Hurst Shifter & Chrome Short Stick 93-02 Camaro Z28 T56 | eBay
At the last second I thought to ask if it leaned to one side and he replied it leans to the left but he sourced me a straight up and down base section.
I can only get 1/2 the gears so today will make a new base plate from 75 x 8 mm flat bar and use a drill and holesaw for the main hole. The alloy pivot section needs to be moved 13 mm or so.
Postage was slow but all's good.