1998 Sebring Lxi Cargo roof bars

Hey, I was wondering if there are cargo roof bars or a similar option that would work for a two door Sebring. Most everything I've seen is for a 4-door but that doesn't help me. If you have any information on this subject that would help because I have very little.

Here's a picture of my car

http://www.mark3films.com/storage/IMG_0005.JPG

btw, the back windows don't roll down.

Thanks!

Mark