i am no expert, so i hesitate to give advice. but...
i think a problem with the grip would be more likely to see you push the golf ball to the right. not have it break right at the end. breaking right at the end sounds like its a spin problem instead of an open face issue. so my guess would be its something in the swing that is causing you to come across the ball from outside to inside, which i guess could be your grip?
last year i bought a david leadbetter swing setter. while i don't think it helped my swing mechanics much. it definately improved my grip. it has this weird grip on the top that forces your fingers to be in the correct locations.