75 Duster Tetnus Shot and band aids

Got the seat out. 3 of the nuts for the seat came off with no issue. The left front nut didn't. The floor support is bent and the nut was rusted to the support and the seat mount was rusted. to the floor The seat stud was so rusted that we ended up cutting the stud just below the seat mount. Then using a punch to drive out the rest of the stud and washer through the floor mount Where can I get the floor supports? I looked at AMD and I didn't see them

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