Wanted to let you know about a metal mesh I found in NE Florida when applying this mod to my '14 JKU. It is a gutter mesh I bought from Lowe's with a slightly smaller mesh pattern than what I've seen on others - which makes it looks less of a homemade job. It also comes pre painted (black) with a nice finish on both sides - looks to have been dipped as opposed to sprayed. I bought 4 pieces for the mod - although you may be able to get away with only 3 if you make tight/accurate cuts. At $2.98 per piece I wasn't too concerned with purchasing the extra one. For my mesh, zip mounts, ties and epoxy I have about $33 in the entire mod. Looks every bit as good (perhaps even better) than some of the +$100 products I've seen available for this.
I bought the same thing last weekend, still working on cutting the panels out - it takes for bloody ever! One question: have you had any issues with overheating while running trails with the tight mesh spacing?