Check out the hundreds of pics of GP riders from the 70's, 80's and 90's on this great site, sorted by country of origin and then alphabetically.
There are even several pics of that rider so many of you seem to love to hate, Mat Mladin, on the Cagiva 500.
Motorcycle Racing Heroes of the Past - The Australians
(For some reason the link makes it look like you will only see the Aussies; don't be deterred.)