Question about Civic antenna--boostable?

[Gabe]

Hi. I've got an 02 Civic LX. Its radio antenna is imbedded in the rear window. Since I live in a rural area, my FM reception is poor, and it seems especially so when I'm driving my Honda. I checked with Honda's parts dept., and they have no booster or add on. Any suggestions? Is there a relatively easy way to add a real exterior antenna? Also, if so, might it not be worth the trouble? Thanks, Gabe