Tarpon 120 seat

Does anyone have any reccommendations for a replacement seat for the t120?  For those not familiar with the Tarpon, it has an attached, folding backrest.  Mine is getting worn out, plus my rear-end is getting tired of the hard plastic.  I am not sure if normal aftermarket seats fit properly on the Tarpon.  Suggestions will be appreciated.
Ben

I have an Endurance seat pad on the tarpon.  It has been in use for 2 years and is still in pretty good shape.  I rolled for a year or so with the hard plastic, killed me!  Get one of these, you won't believe what a difference it makes.  I don't have a pad for the upper, but a friend of mine has the one in the second link.

http://www.seairsports.com/kayak_seats.htm#touring

http://kayakfishingstuff.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=Tarpon-Seat-Back&Category_Code=sts