I looked into those for Badlands but they're not making them so no way I was going to commut to another pedal system with no parts. What's wrong with flat pedals and an undersole shim?
Unfortunately speedplay use to custom make the syzr depending on how much shimming you need. Max shimming was about 17mm. Since Wahoo took over they stopped making them.
Forgot to come back and say thanks for the comments - "thanks!"
Those shims look like they might do the trick. Apparently Scherrit used to have ones that covered the entire sole. Not sure how true that is.
Speedplay SYZR look like the most logical solution to this. There are still some on ebay etc so will talk to Scherrit and see what he thinks.
Will get it all done properly anyway as knees is serious business.