You should be able to get an un-marked mag with no big issue around $40 at a guess on ebay, I saw one last month. If the bolt and action serial numbers match thats the important thing. Then how good is it, wood etc. Here in NZicon 1942 LBs in good nick would be $400NZ+ I assume yours has a 5 groove barrel? such a gun would be $500NZ+ assuming its in good condition. 1950's "C" I think are fairly rare? and certainly un-common in NZ, but Enfields seem extremely cheap in the US

I'd certianly love to have a good one in my locker...

Pictures please?