Check this GPU HSF out. I have used before in other rigs. Looking at the Zalman website implies that it should work, but you may need to do some measuring in your rig to be sure.http://www.newegg.com/Product/Product.aspx?Item=N82E16835118006
BTW, you are not likely to find a solution that pulls in air as you suggested from a width perspective. An alternative, if your case supports, would be to mount a side fan blowing cool air into the GPU/CPU area.