Clamp, $2 plus tax
Button head cap screw, stainless, about 75 cents
A couple of misc stainless 1/4x20 bolts and nylocks, already in my parts bin.
A foot of leftover 3" tubing, cut into short sections, free at the muffler shop scrap bin.
A couple pieces of leftover 1" flatbar.
A couple squirts of...