@Mike_H rebuilt the lower bolsters on his stock seats. A front seat will occasionally come up on Marketplace. You still may want Mastercraft's or PRP's. Just ideas.
Not exactly, but I did hit them with some steam to "puff" the foam back up and reinforced where the foam rides on the seat frame. On mine, I found that the frame had torn the foam, making an already compressed seat sink further. It made a big difference in comfort. I still want new seats...but man...even used ones are $$$