For that you are too close to a custom seat.
http://www.sargentcycle.com/Seats-Accessories/Sargent-Seats-Honda-CBR-600-F2-F3/
or
http://corbin.com/honda/03cbr600rr.shtml
or
https://www.saddlemen.com/cbr600rr
consider a peg kit as well
http://www.knightdesignllc.com/Prod...600R/Honda-03-CBR600RR-1-Front-Foot-Pegs.html
The first two will not work unless I do some serious modding that probably hasn't been done before so.. Those are definitely a no go.. There is a Corbin options for the CBR600F4 but its $500 big ones.
The peg idea is an interesting one, I didn't even think of that.