We have what appears to be approx a 71 truck that was turned into a trailer. We are looking for Spring helpers but the springs are 2.25" wide and the only ones we can find are 2.5" or 3". Why can't I find one for the 2.5"

 

There's a company in Carpenteria CA called SuperSprings. They make a helper spring that looks like it will fit most truck suspensions (except mine!) I believe their web address is www.supersprings.com