Replacement Bucket Seats

I purchased used bucket seats out of a late 60's or early 70's pony car for my 1970 Dodge dart to replace my bench seats...any idea where I can find mounting frames to install and attach to these seat bottoms? The seats came with feet and has the sliders, I assume that I can just remove the feet and mount the sliders to a Dodge Dart compatible frame
Any suggestions for me?
Thanks