Aye, Aye, Cap'n.
Trouble is it's time consuming.
Anyway the original question as asked has been answered twice already.
Don't use Blender meself but would have thought making the shape in Blender, saving it in 3DS format and unfolding it in Pepakura - perhaps at the exorbitant cost of $39 - would be a way to go for this and other segments of a design.