Gucci produced a motor cycle helmet which was sold in Europe for
$800-1000.  Can you tell me where I can purchase one?

I know for sure I've seen it for sale in London , but as far as I know
you can order any gucci piece through a reputable dealer and they will
find it for you and supply you with it

just go to www.gucci.com and find a dealer close to you

I've called a U.S. store and they would not order it, so I'm looking
for an online merchant where it can be purchased.

Thanks.

You might contact the London store(s). These numbers are at this link;
click on the map of Europe and then scroll down thru the column of
locations.
http://www.gucci.com/uk/uk-english/store-locator/

bill in corvallis