67-69 vert rear seat

<=== see my Avatar! I have a 68 Barracuda convertible that I purchased as best described, exploded view! Restoration started years ago, body shop started work and shut down... - insert long sad story here - among other items that were missing, I bought it without seats. I figured I can figure out something to do for front seats. Back seat is the issue, oh and also I'm cheap... :) Thought I would throw it out and see if anyone had an lower and back frame? Or if someone has some ideas? Worst case I build some plywood platforms and it becomes a 2 seater?