Why doesn't anyone produce new historic military firearms?

[Colonel Enfield]

For a lot of arms it's not economically worthwhile because there's still plenty of originals about at affordable prices - but for others, such as the Mauser C96 9mm pistol or the Webley Mk IV .38 revolver - I'm genuinely surprised Norinco or Uberti aren't making reproductions of them (with the Webley chambered for .38 Special).

I mean, it's apparently economically viable for Uberti to make a repro of a Colt Percussion Conversion centrefire pistol (how many people realistically want one of those?) but making a Webley Mk IV in .38 Special is apparently not worth it for anyone.