Hai Fuzzy,
I had my seat altered by Gerd Jungbluth in Germany (near Aachen, the Dutch, Belgium, German border)
Until now I am very satisfied. He make's the seat exactly as you want it. (I even have a gel-pad inside

)
Take a look at:
WWW.MOTORRAD-SITZBAENKE.DE
It works easy, you make an apointment (by email of phone) and drive there with the bike, he make's it as you want it, and you drive back again... If you are not completely satisfied, just go back and he alters it again for you.
You can also send the seat by mail and add a discription of what you want.
Maarten