Dave
I couldn’t find any off the shelf and had a quantity machined up (there was quite a large minimum order which I subsequently sold). Give me a call and I’ll look through my old emails on the subject. I think I still have the PDF drawings the machine shop did for me so you might be able to have some made up locally or if enough interest I can check viability of a group buy as I still have a lot of the springs left over.
All the best