Paul:
I have to ask; the devices that you described, may be "available" here also, in our face and voltage configerations.
Are you refering to the conductor going "straight" into a "hole" at the back of the device, and then you tighten the screw which compresses the "hole" tight??

That may be a very poor choice of words, but I call those devices "spec" grade. They are available here, and they are more costly than the binding screw post, and the back stab devices. I like them, my men like them, and we use them most of the time. Ya get what ya pay for.
John


John