I have just fitted a set of Mopar splash guards to the front of my JK. They are very reasonably priced ($54/set), well engineered, and certainly big enough. They should solve the problem.
The mud without them is unbelievable. The doors (both) get covered, the door handle is plastered, and if you have the window open you regret it. It's made even worse because I have rock rails (gaps).
Now that they are fitted, can anyone tell me, from personal experience, how long they will stay on? To the nearest minute will do
. They look great, but are they practical? I guess I'll find out soon enough.
Someone else's picture of them -
and from the back