I'm currently awaiting on some parts so I can make this. It's going to consist of some metal tubing with some tapped threads.
You have to cut your linkage rod in half, then slide the two parts in this pre-bent metal tube which not only tilts it back to where you want it, but also extends the rod shortening the throw. Just need to do some calculations to determine how big this rod should be for how much reduction in throw.
The ID of the metal tube is 120mm and the OD of the original gearstick is 195mm so it will be a snug fit, coupled with the 4 grub screws holding it in, which also have nylock nuts on them to secure it.
Excited to try it out, even if it doesn't work it's fun to know why/where to improve it.