See 0311's sticky in the training section: How to target specific muscle sections.
It's a debated issue, whether are not you can selectively target certain sections or heads of a muscle. 0311 points out at the bottom of the post that it would it would be better to say you are emphasizing certain parts, but that a good movement is still going to hit everything nicely.
Anyway, what you are looking for is the incline bench movements. Barbell press, dumbell press, and incline flyes. Do the incline movements first in your workout. I have the same issue. So I focus on incline movements. My chest comes along just fine, but the upper part always seems to lag, so I can't say it's worked any miracles.
Hopefully someone will come along with a miracle workout for this