Need some helpful suggestions

I am designing a simple robotic arm that will move an optical mouse on a mousepad.

There will be 3 degrees of freedom required to move a mouse; a “yaw movement” provided by a rotating base (like Lynxmotion bases for robotic arms), an short up and down movement (to lift the mouse a little when needed) and a lateral forward and backward movement implemented by putting the arm on a sliding track.

I have no idea where to purchase a track for this purpose.

Does anyone have any suggestions on where I can find a sliding track to which a robotic arm will be attached?

Thanks.
P.S. ----If your still out there SCUD, your insight would be appreciated!

You may want to go to Home Depot or Lowes and look at the tracks and rollers used for drawers.