I bought the Bestop replacement seats that don't adjust. On sale, with rebate, etc. they were a little over $110 each then.
After two years they look new still. Fit was perfect. Color is dead on. The black denim hasn't faded or stained. Nice. I should have bought them years ago...
You don't really need the adjustable back. You can almost buy two fixed back TrailMax seats for the price of one adjustable one.