You could always ebay for one.... though im guessing there's probably a snowball's chance in birmingham that it'll connect to a Polo, especially if you have an SPi
edit: but that link has hooked me back up with a LONG hunted "shiftpoint analysis" spreadsheet that i lost because of a dodgy backup about 18 months ago........... cheers

To anyone who's been on the rollers: plug your data into this little baby and find out where to change each gear
http://forums.audiworld.com/vag/msgs/861.phtml
(edit 2: ok its not quite the one i thought, but a decent enough replacement
edit 3: and an article on air/fuel ratios that shows why running at full throttle is actually a bit less efficient - lambda 1.0 is most efficient for cruising... 0.85 to 0.95 (ie slightly rich) for greatest power)