Does anyone know of an aftermarket seat bracket that will bolt to the floor and also accept "universal" racing seats?

The set I bought off Ebay stated they will fit, but are not bent correctly for the rear bolts. The horrible store will not return any of my inquiries about a refund.

I have a friend trying to "re-work" them to fit at his machine shop, but just as a backup if anyone knows of another option, I would appreciate it.

When I bought the car it was just a shell with no seats or brackets.

Thanks in advance.