I am interested in one of these:

http://www.sip-scootershop.com/main/base/Details.aspx?ProductNumber=pi605677&_language=en

Sport gel seat for GTS/GTS Super/GTV/GT 60/GT/GTL (mine is 2008 GTS 250).

Also available on Scooterwest:
https://www.scooterwest.com/items/?_pageCCS=t#page=/item_details/Euro-Low-Profile-Gel-Solo-Seat-Vespa-2003-2014-GTS-GTV-SUPER/10369

If bought used I'd be willing to pay $125 (includes shipping).
Wear is fine, tear not so much.