George, I am often described as a hoarder, and I’ve been working on that.
The clip in your photograph looked horse shoe-shaped, and I went Googling, in particular looking at Google images. I did find “poodle” retaining rings, which are somewhat similar - a larger retaining surface than an E-clip. Then I found “horse shoe” brake shoe retaining clips - they looked very familiar.
I checked in my garage, and in a container of stuff I thought I might need, was a small box of brake parts left over from putting new brakes on my daughter’s 1980 Toyota, on Christmas day somewhere in the 1990’s.
There were two brand-new cad-plated little horse-shoe retainers. Slip over the shaft in the groove (they fit exactly - can you believe it?) and gently squeeze the horse-shoe ends with pliers. They are not spring steel - they squeeze in and stay there.
I’ve heard that if you keep restoring cars and you save all the extra bits from each time you eventually will have enough parts to build a whole 'nother car.