67-9 2dr sedan door striker repair

I have a 67 valiant & due to both doors having bad hinges for a long time it has cracked the sheet metal around the striker. I see they sell the panels for ht but haven't seen anything for sedans. What is the best cost effective way to repair this? I already have new door hinges (not installed yet) and would like to address this issue before I have the jambs painted. I am assuming the metal is too thin to weld & grind on. Thanks in advance & pics are helpful.