There does NOT appear to be any current major producers offering a lever action rifle/carbine chambered for the .41 Magnum cartridge. There may be some custom made guns, finding a custom rifle gunsmith will require internet research.
Usually a custom job these days.
That would be a strictly custom affair.
marlin 35 cal. lever action. rifle/ Marlin makes the rifle ,but not the ammo for it.
no one.
Are you asking about double rifles,rook rifles or bolt action.
No one that I know of.
There have been a few. The most common is likely the Spanish Mauser.
Rossi, Marlin, EMF Hartford are a few current makers. Lots of options out there.
A shoemaker or a cobbler makes custom shoes.
Rossi produces the Puma which is a .357/.38 lever action rifle . It is a copy of a Winchester 92 I think. Also marlin, and maybe even Henry have .357/.38 levers.
Best is a very subjective term. Winchester, Marlin and Henry all make very good rifles.