Are there pictures of unassembled planes being transported around? My google-fu is failing me here. 

A friend was telling me about the assembly of carbon-fibre planes, and how the huge parts of these need to be transported long distances between countries. 

Are there any photos of this?
Here you have pictures of wing upper cover being handled and transported:



(Image Source: www.airbus.com)

Wing upper cover is biggest single composite component on A350XWB.

Additionaly try google: "wing upper cover A350", "wing lower cover A350". Those are the biggest. And you can see them in various stages in google.