Good luck.  I too am restoring a sporterized Norwegian Krag, a 1912/16 carbine.  I gave up trying to find both missing stock parts: forend and long upper handguard.  Miraculously, I did find the missing metal pieces; front "band" with bayonet lug, and a middle band, plus many of the screws required and even a cleaning rod tip.  I plan to make replacement screws and wood parts myself - a botched job can be replaced with effort #2, #3, etc.  It is the metal pieces, of which there were several variations, that I found hard to get.
On the Ross Rifle Forum the buzz is about making replacement front and middle bands for that rifle from scratch or from another rifle part(s), and even hoping that Three-D-Printing will soon offer a more economical way to provide replacement parts than having a machinist grind out one. 
I wonder if a replacement US Krag stock, which are sometimes available, might be used to replace the Norwegian one?  I see they are different somewhat, but with enough BONDO...? 

Thanks guys. I'll post some pictures of the Krag later and let me know what I'm exactly missing. I really appreciate all the help.

Thanks again
Trevor