I even emailed GM Goodmark Industries on where their bumpers are made....I was sooooo suprised to get a responce back with an answer...made in taiwan...
I'm a GM mechanic and worked at GM dealers for 10 years. I get new AC Delco parts in an AC Delco box, and inside, the new part is in a bag that says made in china (or taiwan,korea). I'd say that happens 90% of the time.
I don't think you can get good quality parts anymore. Not just in the restoration world but in the automotive world in general... Just my 2 cents...