This is an old thread, but I have something exciting possibly for anyone interested in this plane. I just placed an order with a company that is going to 3D print the radiator mesh for me. I just ordered a 3/8" sheet, that I can use to replace the wire mesh in my cowl. This will have the scale sized hexagon pattern. I am having it drafted out of black material, making it easier to paint and maintain a good color.
The price was extremely reasonable. As soon as I get these parts, I will post my progress and provide info on how to obtain this material. The 3D printing is a great solution to many of our scale detail needs. This has been an item I have needed for years to really finish off my Fokker.