Hopefully this photo works, all the components are black so it's a little hard to see.
Basically it's the original yz bracket drilled out to suit the bigger diameter bolt. The aftermarket peg had a few mm sliced of the tube section so it would slide into the old bracket.
The springs are modern YZ and have one too many coils to fit inside the old bracket. I didn't have the spring hook through the slot in the back of the old bracket as per original, but decided to hook it over the side of the bracket instead.
I eyeball engineered the amount i needed to take off by comparing it to the old spring and guesstimating how much length I needed to get the new hook over the side of the bracket. Then I just cut through the last coil, held the spring in a vise and bent the end over a piece of flat bar with an American Screwdriver
I can take it apart and post another pic if you need ?