Looking to buy several j-nuts that will work in a 1973 Dodge B body heater box. It seems to be an unusual size. It needs to fit a thickness of approximately .100 to .140 inch and have a hole to edge distance of approx .525 inch. I don't know that width and length matter but for reference the width is 5/8 inch and the length is approximately .825 inch. I don't need original ones, just need to find some that have the same hole to edge distance as measured from the center of the hole.