Marlin made external hammer pumps for about 20 years, up to WW1.
They came in takedown and regular, in various levels of fancy and model numbers.
Prices seem to vary from $250 to $1400 for average field grade through excellent graded, heavily engraved sport guns.
They aren't as popular as the Winchester versions, partly due to the Single Action Society rules that don't allow them.
Lock the doors, they're coming in the windows.