PW,
I would try thinning some smooth on (or whatever glue the bow was glued up with, but smooth on should work just fine if you don't know) with acetone. Get it nice and thin, but not too thin. pry open the lam area just a little with a toothpick and get the whole split good and soaked. Clamp it snug, but be sure you don't starve the laminations of glue. In other words, don't squeeze it all out. Let it dry for 48 hours to be on the safe side. And give it a go! BE careful, wear safety glasses when shooting it, but my bet would be this'll work, at least for a while.
Mike