[bdk1976]

The 3/8" cage nuts I mentioned are on ebay:

https://www.ebay.com/itm/204392502632

https://www.ebay.com/itm/195018326792


These are body mounts cage nuts (7/16") from Ames (too large/incorrect for the lower fender bolts)

https://www.amesperf.com/parts/38588/