Wanting a Replica L42A1

[Surpmil]

My advice: find a No4 Mk2 rifle that is cut down, sporterized or shot/rusted out in the bore. Rebarrel using whatever barrel takes your fancy: lots of retired target rifle barrels are available that are still perfectly good for your purpose but not up to grade for target work. You'll probably have to have the threads cut and you might as well have the shoulder cut for breeching washers and have the smith/machinist make you a few of those at the same time. Canam in Canada has 7.62mm extractors. Mags are available here and there. For a scope mount, get a reproduction of the Soviet PU mount and machine the back flat to fit the side of the No4. This is the only scope mount system I am aware of that will allow you to simply screw the base to the receiver and then collimate the mount/scope to the rifle bore and then remove and replace the scope without appreciable loss of zero.

For a lefty this is a lot of work and expense for a rifle that still won't suit you like a LH rifle will. A Savage of some type might be your best and cheapest bet.