Cool project!

Steele Rubber Products has the weatherstripping...
https://secure.steelerubber.com/search_frameset.php

I doubt you will find a disc brake setup for that car. You may be able to retro-fit something or go to a Mustang II front end.

I would cal Fatman Fabrications. If anyone has done it, they have.
http://www.fatmanfab.com/