Understand fully where you're coming from.
However, and going way-back-when,...was never truly sure what ACTUALLY is Made in USA.
First part replacing (re: Directional Flasher) on my brand-spankin-new 79 Mustang, was made in Mexico. Only that replacement flasher purchased from my buddy Joe at local gas station was made in USA.
A few years later (around early 80s), I was surprised by some TV Reporter that 40% of GM engines were currently being built by Mitsubishi. That was about time when first heard that if WE ALL BOUGHT American,...everything would be just hunky-doory.
I double-checked such by questioning a good buddy of mine whom initially was a Committeeman at Linden GM Plant. He basically caught The Brass Ring & moved to Detroit, where he then became some Big S--t at The UAW.
While chit-chatting with Ed, I asked if it was true that GM got about 40% engines from Mitsubishi? He quickly responded NO.
We get about 80% of our engines from The Japs.
So then, Stick or anyone else for that matter,...what do you think the likely percentage of American engines coming from asia in 2010 NOW IS?
About 85%??? 
If oddly or strangely so, you can bet-chur-bippy that other 15% of engines come from Mexico.
Neil