If the rubber is only shrunken, not chewed up you can glue it into place. I think I used DAP's Weldwood in a squeeze bottle. It’s held up for over a year. With the rubber in the correct place it really cuts down on road noise.
Email Shane Cox at Jack Miller Auto (www.allchryslerparts.com) and ask for a part # and price quote. His email is [email protected]. I have replaced both driver and passenger side window seals and they were a ***** since it also contains the front window track seal that travels all the way down inside the door, requiring removal of the door panels.