If it is the whole trigger pull you don't like, try Lakeline LLC, as they make a few cheap parts for the G2c-springs,stainless steel striker guide,etc., to help for a little smoother pull. If it is the trigger itself, there are a few makers of just the trigger shoe like -Galloway Precision-which makes some great stuff. I have swapped out just the trigger show on a few guns and they made an amazing difference in the pull/feel.
For the money, to me, the G2c trigger is not bad but to each his own and fortunately, there are a limited amount of companies that do make parts for it although not easy to find.