They are still selling the Alvin compasses on Amazon.

https://www.amazon.com/Alvin-201-Introductory-Compass-Divider/dp/B007RZJTY4

I had a Mr. Pen set, though I am NOT an engineer so can't really say if it's quality you are looking for, but will say it was good for art projects I wanted it for, when drawing mandalas when doing zentangles.