Any Stand up comics out there have a link to how to handle hecklers?

Im looking for a list of easy and witty comebacks for hecklers. My friend and I do a comedy song routine but personally I am more a musician than comedian.

I know the patter thats been written and the music but I know there will come a time when Ill need to be a tad more witty than I am… hehe

I can handle most situations but I want to be able to snap out a comeback that is entertaining, funny, and will put the heckler in their place.

Any links or lists of great comebacks out there?