Unfortunate Upholstery accident-1968 Driver bucket track needed

I wish there was some way I could help. A pic of the part(s) you need would help me determine if I have something here you can use.
The bench seat tracks are very different. Even that release lever is too short to work on a bucket. Parts can be moved from one to another or fabricated as needed.
Just for the sake of knowing... there is a fairly large hole in the side of the seat bottom frame. I know these frames crack at the top of that hole when a large person getting in and out over stresses the steel. A clutch pedal is a wear factor too.
Since a car ran over your seat, you probably should look for such a crack. Closong the crack and welding a flat washer to the inside is the fix.