Touchscreens for CNC

Hi All -

Does anyone know of an economical touchscreen panel that can be
mounted onto a monitor and connects like a mouse? It sure would
be useful for some of the CNC GUI's we're discussing. Of course,
it would need it's own driver with calibration settings to match
up with the screen. But this is all pretty low tech, isn't it?
I'm surprised I've never seen one separate from the monitor. I
guess I should do an internet search...

Carlos Guillermo
VERVE Engineering & Design