I bought a complete weatherstripping kit for the car around Christmas from Scott Bell. I am thoroughly impressed- it is an exact match for the original stuff. Time to throw that stuff right out! Here's the link to the kit, with a list of all that is provided: http://pantera.saccrestorations.net/dpwk0001.html
Scott Bell is a great guy. I can't speak highly enough about what he's doing. Yes, he is a little bit on the "dark side" for putting an LS motor in his Pantera and selling the conversion kits. I like Ford V8's but will not bash the LS- it's a great motor family and a modern testament to the all the good parts of pushrod engines the family keeps alive in so many ways.
Scott's other products can be seen here: http://pantera.saccrestorations.net/index3.html