I invented a movement that would simulate it with dumbells, however I have never used it as I'm a compound man. basically you're laying on your side on the bench. you can only work one side of your chest at a time though. say you're doing your right side, lay on your right side, let your right arm hange off the side of the bench and 'curl' the weight up to the most contracted position keeping your arm straight, using only your chest. your right leg should be firmly grouned into the floor so the weight doesn't pull you off the bench. like I said, I've only tried it a couple times, but it isolates the chest really well. I can't say you'll get anything out of it, but you can try.