Try restorationspecialties.com for rubber; they have the early B wagon quarter glass seals.
Patch panels, try Sherman & Associates. If the rear quarter areas roll under like an early B, you can make those from sheet stock pretty easily.
For glass, try your local auto glass shop or a Mopar yard like Stephens'.
'65 Valiants are my favorite early A, and y'all already know I like wagons.
I'm guessing you want some room for headers?