I have a pair of low-back bucket seats that were in my '56 Fairlane when I bought it in '68. Obviously not original to it, and they have black naugehyde recovers on them. There are mounting holes on the tops for headrests but they're missing. The original upholstery is gone. I'm thinking early 60s GM? I'd like to get them redone but would like to see if something's already available rather than have them custom made. And ideas?