Re my 2005 E450 chassis .... remember I said above that it was 95-96% "back then" .... 95-96% is 95-96%. More recent research on where parts are coming from doesn't count for what may have been the case back then.
"Made in XX" country is what you have to look for, not whether XX company's name - that just happens to have their headquarters in XX country - is on the product or not.
By the way, "giving in" to all this manufacturing from far flung places and buying stuff from all over the map, anyway, is not helpful in reducing it. Vote with your wallet - it's a more powerful vote than you think - but I'm afraid it's too late.
Most of us (including myself many times) have already given in by chasing the almighty dollar. "Chasing the almighty dollar" has two faces: Either giving up too much in the long run trying to make a bigger money pile, or giving up too much in the long run trying to hang on to what small or large pile one might already have.
IMHO shopping for value, not price, is the name of the game.
P.S. I'm well aware of the Canadian parts and/or manufacturing content of my 2005 chassis. I just tried to keep it's birth place "mostly home" at the time I bought it.