well. i had an idea for a "a pillar" mount. it would not be on the pillar but really the fender. go to your jy and get a couple of the antenna mounts. you should have one on the jeep so you really only need one. but i would get a spare. then take one off and take out the stud that screws onto the antenna. then drill that out and put a bolt that will work for your light. put the "antenna" mount on the drivers side fender where it is on the passengers side. i have not done it, but it just popped into my head so i thought i would share.

 

Wouldn't last very long with anyone who wheels there Jeep.