You have some options.
1. you could take your seat to a custom upholsterer and have it modified or
2. get yourself a different custom seat.
No seat is the same for everyone. While some my prefer Corbin, Russel or others, some still prefer the stock seat. It's your bottom side that is the deciding factor.
Corbin seats can be a hard seat. I've had 3 different ones and have sold 2 of them.
Currently I have 2 Russel Day Long seats and a Corbin. The corbin is fine for short trips and work commuting, but when it comes to longer trips(especially with the wife) it has to be the Russel.
You can google custom motorcycle seats, and you will come up with the Mayer brothers and Russel and other results.