Jason - welcome to the garage! lotta good info here, and the links page is agold mine of places to check for good repop parts - the swap meet [where ya hafta register separately, tho' can use same name etc] also is a good place for wanted ads
that said, for the TaskForce trucks there is a patch made for the lower 6" or so of the door skin, and excellent quality complete new door shells are also available now - check the sponser at top of any page here, and lots of other vendors have'em, if there's any closer to yer hide out - there's also patch panels for the lower hinge pockets, and various others
good luck w/ that heavy hauler, and get some pics up for us to have a look at - we all like pictures!
Bill
