Lee Enfields require a large amount of hand fitting due to their design. AIA had trouble making a go of it at around $800 a pop a few years ago, and that was with all the little bits made in countries that have labour costs near slave wage. I'm sure a North American version would go well over $1000, and no one in their right mind would likely buy one while you can still easily find sporters at gun shows for $80-$125. It'd be like building brand new SKS's for $1200 a piece while Canadian Tire has them on the shelf for $169. The LE is also limited to .303 class cartridges due to the rear locking lug. It's not easily adaptable to fire many of the modern cartridges in demand.
And the Ross served till 1915-1916, not quite 100 years steady.