Fuel pump for 1936 8 cylinder Railton

Working on the fuel system on my 1936 Railton. Looks like someone installed a high pressure electric fuel pump at the tank and it runs through the mechanical fuel pump which may not be working. Thinking I want to restore it back to the original condition and get a working mechanical fuel pump or rebuilt the one I have. Does anyone have a source for one?

Also found two pickups coming from the tank.. Not sure why but they both end up at a fuel filter in the engine compartment. Not sure if it is related to the switch under the dash that adds more fuel to the carborator in the event of a vapor lock. Any help with these issues would be appreciated.

Robert