Comfort Hybrid felt basically the same as Pro Hybrid but I'm just judging it from the 2 hours of play with it from a demo.
You can try these Gamma replacement grips listed below. I haven't tryed these ones out but they seem pretty reliable.
http://www.tennis-warehouse.com/Gamm...GHTGELCBK.html
http://www.tennis-warehouse.com/Gamm...-GHTGELBK.html
Dunlop :
http://www.tennis-warehouse.com/Dunl...-DGZCRGWH.html
http://www.tennis-warehouse.com/Dunl...OP-DGZCRG.html
Links above are grips i have not tryed yet so i can't give details about it. Reading customer reviews on these might help just a little bit.