67-69 vert rear seat

Rear seat frames from verts are often quite rusty, especially the bottoms. Not rusty wont be cheap. Bottom frame from some other, like notch back, is a materials donor for restoring a rusted vert bottom frame. Sebring seats would be most affordable route.
I'm looking at the pics above and wondering could that bottom frame be modified to clear the hump, fit better. It probably isn't made of much. Most newer seats are just molded foam on a wire frame, no springs. Good luck to all.