Rear suspension question

[alderan33]

I have a 72 c10 with a leaf spring suspension and I broke the upper shock mount stud on the passenger side whilst changing the shock. I cannot find a replacement for it as most of these trucks came with coils spring suspension. I also need a u bolt for the rear end. They have flat tops, not typical to the leaf spring setup. Does anyone know where I can get these parts? I have checked the usual places, LMC, etc. nobody has what I need. I tried to attach pictures, but it won’t let me. Thanks for any help.