I've been doing a bit of research on this theater, and there are some intriguing possibilities. It looks like at Narvik the Germans had ad hoc combined forces groups including Gebirgsjager, Fallschirmjager, and Kriegsmarine from vessels that were sunk in the naval battle. So you could theoretically field a force with all three types of figures in it.
The one thing I'm having trouble finding is information about armored forces. I came across a reference to the fact that the FFL landed at Narvik with five "light tanks," but I'm not sure what marks they were. Perhaps I'll start another topic to explore this question and what armored forces the Germans might have had.
I will definitely be placing an order with Gorgon for FFL and German mountain troops ASAP...