Shock Mount Spacer?

[SeventyOne]

I am in the process of getting my Blazer put back together and just put new shocks on. When I put the fronts in there seemed to be a part missing and sure enough when I went back through the pics of the before pictures there seems to be a spacer or bushing that allows you to tighten the upper shock bolt without bending the frame mount.

Does anyone know where to get these? I seem to have misplaced mine and can't find them online...