Thats WrightThe only certain answer to this question is "Not Many".....far far fewer than any other main stream manufacturer. Only Confederate or Bimoto produce fewer bikes.
Now, if you can get Varese to give you this information we would all love for you to share it.
I do know, from a reliable source, that there were less than 50 white 910Rs shipped to the US for the 2008 year model.....and only about 25 Orange 910S, making it an exceedingly rare bike here. But the US is a very small market compared to Europe and the UK.