Success!

I found this nice, high resolution ... 1920 X 1200 ... image to use as my mouse pad.

The friendly chap at Strathfield Plaza cropped it to A3, made an excellent print and then trimmed off the edges.

So, I now have a very pretty, flat, rectangular surface that my optical mouse tracks on perfectly!



Update: Here's a (rather poor, because it's hard to get very far above the desk) shot of the mouse pad in situ ...