I believe firm feels sells bolt on shocks bolts. You will have to drill out the plates where the original stud was.
Once upon a time there was a chevy truck (82?) that included a similar bolt on shock mount bolt with replacement shocks. Those trucks were prone to the bolts coming loose and the threads being destroyed by the looseness.
I checked firm feels page and could not find them, but I really do remember seeing them listed in one of their print ads in mopar action a few years back. I might be wrong and it was a different company, but I definately remember the bolts being on the page where they listed all the tools they offered for sale that were for rebuilding a mopar front suspension. I would give firm feel a call. Another choice that does have them listed but you have to call for pricing is espo and they have a good reputation with the mopar crowd as well. espo's page--