Hi, Profeser!
There are at least half a dozen different magazines for the Lee-Enfield rifle.
For the older rifles there are at least 4 different ones and they are made by 7 different makers through a period of over 60 years.
For the later models, there are at least 3 distinct types, made in any of 5 different plants, not counting pre-production mags made in another plant.
If you can tell us the manufacturer, model and year of your rifle and any markings (under the Bolt-handle on the early rifles, left side of the Butt Socket or left side of the Receiver on late rifles), it is likely that someone will have a spare CORRECT mag for your rifle.
They are not strictly interchangeable, although the later ones are supposed to be. Magazines for the early rifles were handmade and individually-fitted.
As to CHARGERS, likely someone has a few kicking around. Chargers, if they don't want to feed, can be slicked-up wonderfully with a bit of Crocus Cloth used on the INSIDE of the feed-lips. Loading them is easy and they feed very well if you load them the Army way: _-_-_.
Hope this helps.