Fuel Pump issue?

Auburn Cord parts in Kansas should have a modern diaphragm for the fuel pump or are able to rebuild yours.
My 2 Cents
K Clark

With perhaps an hour of running time after an oil change, my 812 engine (FB2605) sump is perhaps a quart overfull with thin, gasoline smelling oil. It seems to me that the only way that quantity of gas could get into the oil in that short a time is through a leaky fuel pump diaphragm.

How difficult is it to replace the diaphragm vice the entire fuel pump? Is the diaphragm available as a separate part? Suggestions for sources? J.K. Howell shows entire pump, but no diaphragm. Other suggestions?