A little off on this thread: Did Savage or Stevens make a gun that was somewhat based on a Krag? Kind of like Remington using their 1917 Enfield tooling and design to make their Model 30. I made a part for a friends rifle about 30 years ago and I thought it was very similar to the Krag but had the magazine on the bottom I think.
Back on subject, I doubt any of the original US Krag tooling still exists. Two world wars since when all available scrap was melted down. A couple of old photos have been posted here showing some of the machine work being done, that style of set up is no longer used in any machine shop I have been in. Also there would be a need for function gauges to measure relationships between feature on opposite sides of the receiver, that stuff will all be gone now.
The Krag receiver would be hard to digitize with all the strange angles. To make them today investment casting would be the only way to go.
Never made stocks but a wood krag stock can not be easy, so thin under the magazine, it would not be hard to scrap half of a 50 piece run. Look at how many poorly fit repo stocks have been made. Composite sporter stocks maybe would be easier.
   Stuff like this is fun to dream about, I would like to have a Krag receiver and bolt made out of L-6 tool steel treated to 52 RC, with the guide rib also making contact, you could safely chamber it for Weatherby rounds.