This may be what you are looking for... Just not sure if the X2 and touring is the same. This box was designed and made in Quebec, for the X2 and it is available through http://www.motovan.com/catalogs_en.html

 

PO2876660 Cargo Box, Sportsman Touring 1-Up $229.99 plus tax

Hopefully this will help you guys out!

 

I would have to say that the Tube It from Tamerak is awsome. This big dry box can be mounted either on the rack or off behind the rack. The Tube It can be easily removed from the mounting brackets so that you can take it with you. Please give it a look.