Ok anyone who has an 83-86 knows about the belt weather strip for the outside.. so steele rubber offers a kit and restoration specialties also offers a kit. Has anyone bought these kits? $220+ for a "kit".
If you are referring to the "dew wipes" at the base of the door windows, there a great write up on it (it's a sticky post), purchasing parts from JC Whitney. It's pretty cheap and fairly easy.
I used these
http://thelincolnmarkviiclub.org/documents/tech/RefurbishingLincolnMarkVIIDewWipes.pdf
Classiquecars.com sell other rubber parts. You might want to take a look. They can`t touch $200 though.