If only want the mechanical components for a small router/engraver I would suggest
http://www.widgitmaster.com/
Eric is a retired aerospace machinist who makes very precise aluminum gantry routers as a retirement job.
Search for widgitmaster on this site and you'll find some of his customers for references.
You can bolt on stepper motors and wire up a controller yourself by selecting components from Gecko, PMDX, and other vendors. Or you can buy a CNC motor / electronics package from HobbyCNC, Keling, or others.