way too costly. it's a specialistic sniper weapon, while the Lee Enfield, well let's say costs are pretty all amortized by now.
Remember, the old Lee Enfield rifles were never designed as sniper weapons. They were battle rifles first and foremost, which just happened to be pretty serviceable as sniper weapons. Additionally, I don't think the rifles to be replaced are scoped rifles. As far as I know they are simply standard Lee Enfield No.4's.
I think it's a bit of a shame that the old Ishapore production line in India was shut down. Their Lee Enfield rifles were very well made from what I'm told and chambered in 7.62 Nato. The Enfield design is very old, but it's still damned good. The action isn't as strong as the old Mosin, but its cock on close design allows much higher rates of fire.