U-bolts for 8.75 Swap

I had mine made at the local big rig repair facility when I swapped leaf springs on my 7 1/4"...I think it took them about 30 mins and only ran about $36 for all four with hardware. I'm sure they could've done the same thing with the 8 3/4", but I bought those off eBay since I had to buy some other crap at the same time. I want to say they measure them by ID, which you already know is 3"; and like rest of the folks on here say, length will depend on what all else/if anything you have attached.

I would also say try out a local trailer repair place...sometimes they have them on the shelf.