2nd gen leaf spring bolt missing - identification & replacement?

I recently had my suspension upgraded on my 2nd Gen Tacoma.

There is a bolt apparently missing from one side of the rear leaf spring. I've added a picture of the one that is present. The identical bolt on the opposing side is missing.

Does anyone know what I should be searching for to replace this? The black U-shaped piece is there; just the bolt is missing.

 

Those clamps hold the leaf pack together horizontally, as the leaves splay out without them in place. Yes, you should have a bolt in there. Just take out the good one and use it to get a match at the store.

 

Ace hardware. I just did the same thing for an icon add a leaf for a customer.

 

100% remove the one that is in there and go match it up at any hardware store.