The pad that I use is from JL

http://www.jlathletics.com/jel-seat-pad/dp/10176

I have also used a sorbothane pad it too is very good!

http://www.jlathletics.com/sorbothane-seat-pad/dp/10177

Hope this helps!  Nothing worse than a sore butt :-)

--- Guy ---

   I've used one for years in my shearwater,i like it but if I had t replace it I,d carve my own out of foam to get more thigh support and choose the back band best suited to my paddling style

   cool, thanks for the links. will get one on order