Replacing Delco Spiral Shock RUBBER BUSHINGS

[CamarosRus]

Wanting info on where to buy replacement Rubber Bushings for Rear Upper Delco Shocks that have a steel crossbar/tiebar for bolting into the body.

I bought front lower busings and rear uppers from Dan Patch, but the uppers were wrong...

Corvette Central shows a upper bushing but Corvettes use a bolt to hold upper end of shock and not the crossbar method....
so Im not sure if Corvette Bushing will work and Corvette Central gives no specs ...............