shock mount bolt

the shock mount bolt or stud not sure of correct name, On the duster 1976 the stud You bolt the rear shocks to go thru the sheet metal on outside of car and into the trunk well 1 is gone broke the shock top off the other i have in hand. My problem where is can I get another bolt/stud.I'm not totally computer smart yet My smart phone still makes me look and feel stupid LOL is there some where I can get one. Its about 5 inch's long

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Have you tried a wanted thread? Something to try first!