I went down the very same road.
Ultimately I discovered that it was easier just to replace them entirely. I wound up with two leather bucket seats from a Subaru for $200.00. I removed the undercarriages and replaced them with the Ranger's. The Ranger air bag mechanisms fit onto the new seats, the seat belts too.
It was a real struggle for me, mostly because I wasn't sure if it would work. But it did. The new seats are much more comfortable. Looking back I think that most buckets would probably fit.
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