If you're talking about that fuzzy type seal at the top of the door window channel, you might take some measurements of your RC the top, the forward and rear channels where the window glides along. Then check some late model Dodge Ram pick ups, at your local JYards. You may find a good close fitting substitute. I also found that Automotive Goop works extremely well attaching the weatherstrip around the rear hatch on my RC. It does not easily drip, so it gives you time to work on the weatherstrip etc. Once it cures it attaches very firmly where you put it. I ordered some off ebay, as the big retailers in my area of FL seem to understock it. In the case re ebay. I received it within days, it was very clear, flowed well in short..."fresh" !!
Whenever I purchased same from the big box stores, the goop seems to be cloudy, as if it had aged..too much shelf time ?? I was never able to use the total product. So I know where I will be shopping for that..in the future. Good Luck.