Thanks so much sc wireman. Your response is exactly why I visit this forum.
Four years ago the Wago rep sent a box of those to try. Briefly tried them, but don't work there any longer. Since, have run into so many 'made in the USA' types that even talking about them has seemed perilous and it was forgotten.
Wago hides everything on their web site. Here's a picture of what you're talking about http://www.wago.us/products/10103.htm
and a downloadable acrobat file with info http://www.wago.us/pdf/wall.pdf
Sent them an email. Their site sucks but I'm sure they have distribution channels. Haven't seen them at the local shops but that doesn't mean much.