72 duster seat brackets

Hey everyone. I just bought a 72 duster yesterday and noticed that the bucket seats are not from a 72. With further research I found out it was originally a bench car and that the buckets were from a 74. The driver seat was a bit wobbly so i took it out and found that the inside bracket was missing and replaced with a shorter piece. Does anyone know a good place to find these brackets or sliders or whatever you want to call them? it seems like i will have trouble finding a solution.