Most infuriating/unbelievable thing happened...

I was at a gas station and I had my drivers seat out of my car while I was vacuuming the carpet. Through the corner of my eye I saw a car backing up close to where my seat was, though I didn't think twice of it. When I was done I put the seat back in my car and realized it was broken. The frame on the base on the left side right where the L bracket bolts in broke, so the bottom part of the L bracket moves up and down with the back of the seat but is not attached to the frame. It's a long tube and it's not bent at all, just broken. It's also hollow and I can get it aligned again. Since I'd like to keep these seats, is there an hope I can get them welded back or get a rod inserted on the inside and welded in?