The bolt has a round head that engages the round hole in the rubber spring pad , the nut may need to have it,s points ground some to fit the other half of the rubber pad. There are a bunch on ebay. And some auto parts might have them. Dorman makes the too. And Summit racing has them.
Mike
https://www.ebay.com/itm/Leaf-Spring...xaeL0K&vxp=mtr
