If you don't find a used seat you could always send your original to be rebuilt with better foam. Google "spencer seat". He did mine for $75. I'm really happy with it.
'04 Nicky Hayden
Flapper/PAIR Mod-Ladybird Full Ti Moto-GP -w- Long Cans-Proton Flushmount LEDs
HotBodies Undertail-Tyga CF Hugger-HEL Lines
Custom plate mount w integrated LED brake light
15/41 gearing-PCIII USB-Speedohealer-Carbone Lorraine Pads
Spencer Seat mod-Ceramic dual coat headers
It is a wise man who knows where courage ends ...
and stupidity begins.