Just a thought, but maybe you could install a roof mounted antenna like I did. I bought this MDX style antenna from locustom.com for $35 and the reception has been great especially since it's electrically amplified. I had to install the antenna here becuase I installed sidemarker lamps where the original antenna went. Although I got my sidemarker lamps from a jeep dealer in europe, I'm sure you could find similar sidemarker lamps at circuit city or online somewhere. Not only would this take care of you antenna problem, but it will also give your KJ a pretty unique look.

Here is the link
http://www.locustom.com/mdx_kit.htm