Correia-
Don't know if it'll come to anything, but you might contact Steve Mason at Gunsite in Paulden, AZ. (520)636-4565. It's a fairly large operation that's always looking for cheap labor (aren't we all). You can tell him that I referred you.
Other than that, I'd contact all the major manufacturers of firearms, scopes and ammunition. Some may have formal internship programs. Good luck.
Rich Lucibella