Have a look at Soffseal.com, do a part number search on E707A. Same stuff ERA uses, but with the adhesive. You can also buy the 3M adhesive in a roll at Autozone by itself and use it with the ERA supplied weatherstrip. That's the gray foam tape with the red peel off strip. Lay the tape down, then the gasket.
I used some thicker weatherstrip E1723 on the trunk because it leaked with the ERA material. YMMV
Sam