Well there are several variations of the fairlead license plate bracket
that you can find a different places. What I don't like about those is that it's too easy for someone to pull it off and steal your license plate for whatever reason, even if just to screw with you. But you could get one of these and just keep your front license plate with you in the Jeep, and if you get stopped, you can try saying that you forgot to put it back on after your last offroading trip.
Fortunately for me, when I got my ShrockWorks Bumper
, it came with two holes along the top to screw in the bottom of my license plate. It also helps keep my winch out of sight from nosey trouble-makers.