Leaf spring rebuild kits

[Paul 500]

I need to rebuild my leaf springs & i wanted to know if just one company makes the rebuild kits & supplies it to all the smaller companys. As the kit from Roger Gibson is $165 & from mopars by crane its $89.50, both contain the metal clamps, rubber insulators, plastic spacer things & zinc interliners. I want to get the one that looks correct but i dont want to pay $165 if the $89.50 one is exactly the same.
Are all kits the same ?