I am getting one custom made this spring. They will measure and adjust by the way I sit on it. It helps that its local so if their is a problem they can fix it. I had gel put in mine and it did nothing for me.
Sent mine to Danny Gray to have it redone and they screwed it all up. So I sent it to C&C seats and I love it! It doesnt have gel or memory foam in it but I find it to be comfortable
I had mine done by Mean City Cycles and did nothing for me. It might work for someone else though. I called C@C awhile back but at the time they could not help me. I called them bc my Sport Tour seat from them was by far the best seat I ever had. I might give them a call now.