Just did a search. Found a fair amount listed. Kind of hard as only the Trac fits due to how they mount and pivot down.
Found them listed for $100.00 in most cases. I assume that is for the complete seat though. If you would like a confirmed price post your year as well as your zip code and I'll get a concrete price with freight.
If you do not want to post the info, send me an email via my profile.