cast iron oil pump
I don't have a pump for you but it is worth mentioning that the pump you need could be from a 1939-46 Chief, 1939-42 Sport Scout, or any 741 military Scout. Somebody out there has got to have a pump with your name on it. Good Luck with your search.
Complete ones come up often on ebay and sell for $200 to $250. A body just sold for about $170.