Do Any Mfrs Still Make Spark Plugs in the USA anymore?

['68OrangeSunshine]

A few years ago I switched to AC/Delco when Champion went south of the border -- along with their quality control. [I will admit I havn't tuned up in a while.] I was able to buy 2 AC R44XLS, Made in USA, and then the next box was Hecho en Methico. So I rejected it. I went to a few different flaps and the same story -- AC, Champion, Autolite -- all made in Mexico.
Finally the counter guy talked me into trying [Nippon]Denso platinum plugs. When I got them home I opened the box, but they were a smaller socket size and too short [not XLS length]. I'll take 'em back tomorrow.
Application is a '68 L6 292, w/ Pertronix Ignitor II in a '68 Chevy C/10 Stepside.