Now that I had my fans, I needed to make a part. I decided to use google sketchup... Interesting program -> at first I couldn't get it to do what I wanted, didn't feel comfortable... but after about 1/2 hour suddenly it all just clicked and for whatever reason I could get it to do what I wanted easily. Strange learning curve, to change so abruptly, but it's a neat little program once you get the hang of it. I did have to get a plugin to have it export stl files for pronterface/silc3r.
The bracket simply slides over the side of the larger nema 17 motors (for the x-axis just sliding it on is secure enough). For the extruder stepper I used a couple of M3 bolts to add a bit more strength (but I'm not certain this is really needed). The y-axis motor is tucked away underneath so I just ziptied a fan on the threaded rods -> works ok but not as well as these bracket/ducts.
It's not perfect, but it works better than I expected. My gut feeling was that I would need to put a heatsink underneath, but that ended up not being needed at all. I wanted to put the extruder fan towards the right side and towards the back, but that's going to take more time to design than I have today... perhaps in the future. I put it on thingiverse here. Feel free to download it and change it as needed (it's a simple design but I wanted to get a feel for how thingiverse works).