Pair of main leifs needed

I need a pair of main leafs for an '80 Volare wagon. The front eye has rolled down till the leaf almost lines up with the top of the front eye. I am also converting away from the "isopad" setup. I have the plates and u-bolts but still need the center bolts with the right head size. I have an idea on the bolt but if someone knew where to get the right bolts for that job and the part numbers that would be fantastic.

Thank you for all your help!
Author: Nuttyprof