Numrich or Liberty Tree? Availability may be spotty.
Basically you have an action, barrel, and trigger/mag group. Most of the other bits you'll have to source. It may be worth buying a sewer pipe M38 (or an 8mm conversion that's unsafe to fire) with all the parts, and doing some swapping.
One of these days I'll get a M91 TS or long rifle. I kinda like Carcanos, and you can actually find 6.5 Italian every now and then.