From my experience, the stainless screens are easy to make. The mounting of the screens is the hard part. On my first 996, I installed the Rennline. They are top-of-the-line and have very good instructions. I had extra mounting hardware for 996 #2 because, back two years ago, the center radiator kit was the same price as the standard set. So I bought steel mesh from Paragon to make my own. Tin snips, some pliers and a Sharpie are all you need to make your own. You can pirate some general pattern gouge from the online Rennline instruction pictures. For the money, prefab screens with decent hardware and reviews are probably the best way. $275, or so, is small potatoes compared to replacing just one radiator or condenser. Plus, the screens finish the look that Porsche should have.

$12 of black gutter screen. It is good enough for member gt3s, it is good enough for my C2. Guttersupply.com and a decent pair of tin snips. Once it is installed, you can’t tell the difference from the $275 version.