greg bender
http://www.thisoldtractor.com/gtbender
Thanks to Charles Hamer on the Yahoo! Loopframe_Guzzi news group for suggesting this idea.
Harley Davidson part number 50112-99. This spring fits very well, it's also coated with thick plastic and cost USD $4.95. For best fit make sure the ends of the hooks point to the rear of the bike when stand is fully extended.

Harley Davidson part number 50112-99

Harley Davidson part number 50112-99