I like your mudflaps. I have something similar, only I bought mine. They're called ENKAY.
You can see the ones I got at:
I drove 10,000 miles with mine on last summer, and went to (where else?) Montana. We went on one 15 mile section of road that was under construction in SW Montana, and I wouldn't want to even think what it would have been like without those mudflaps.
Incidentally, the ENKAY's are adjustable both up and down, and inward and outward, as well as removable.
I also have a 4x4, like I see you do, but mine's a Ford F250. Sitting up so high, and with those AT tires, they sure do throw some kind of rocks. So, those mudflaps are indespensible.