Shouldn't be hard to find on the net. Search for "dovetail slides" or "stages" or "X-Y slides" or "X-Y stages" in Thomasnet.com or globalspec.com . I used a pair of dovetail slides in a design to position a tool accurately but inexpensively.
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
Try the DGE series of Festo linear slides. Used them on a job recently to apply glue to the inside of a bore. They werk well. You can contact me directly if you need more assistance.
sorry, thought it was the x-axis only. You could probably go with a piggy back set-up, one cylinder mounted perpendicular to the other if you have the room. Alterntavily, try Festo.