I just got a quadratec ( www.quadratec.com ) catalog in the mail the other day. They now offer Samurai replacement seats. They are $150 each and come in Grey and Blue/Grey. The best part is that they don't require any brackets. They bolt in using all of the original equipment according to the catalog. The seats themselves look nice. You will have to get the catalog though as their website does not list them yet.
Hawk Suzuki ( www.hawksuzukiparts.com )also offers a "kit" which includes the brackets and two seats out of a Swift or Esteem for about $300 dollars. You can get just the brackets for I think $75 and locate your own set of seats at the salvage yard.