i need door seals

i'm in need of door seals for all the doors on my '85 conversion. both front, side double, and rear double doors have seals which have shrunk. is it possible to buy new seals?? i'm assuming that ones from a junk yard will be worn and damaged as well. any help would be appreciated, thanks!!

Wow they are hard to find I did a search and found this 1 site . http://www.1aauto.com/1A/Weatherstrip/Ford/VanFullSize?source=YahooSS&ovmkt=R1LTPHPODKKBIOESQ3IBQ2RQN4

thanks again ranger man... are you the only person on here?? lol