Can't remember where the heck I got mine from now, but it was only about £25. I got it in November and as I ride every day, through the winter, I can tell you that it made a BIG difference in terms of cold.
I guess now that I've had if for that many months I can't really remember what the standard one was like, but I don't get a lot of buffetting up to about 90 mph.
Here's a pic -
http://www.kapital-sales.co.uk/desmo...t-22-2-004.jpg And another -
http://www.kapital-sales.co.uk/desmo...tura%20001.jpg Looks OK, does the job.
Phill
P.S. Just remembered that I got mine from Busters Accessories.
[Edited on 21-7-2004 by phillc]