That sounds about right for bolts that size. I think when I did the rears on my nissan it was about 40-45 to order some online then another 15-20 for shipping so I ended up just pulling one off of one of my spare trucks and took it to my local spring shop to have them made and got longer centering pins since I was adding a leaf and it was still only a little bit more buying them local.

1967 Chevy c50 327 w/ sm465 5000Ib front 15k 2 speed rear w/ 22k springs, single axle, hydraulic brakes