Dual Action Fuel Pumps - What are my options?

[Jim Yergin]

I found one on eBay. I see them there every so often. The seller represented that it had been rebuilt to withstand today's gasoline formulations. So far it has worked well for me.
Jim Yergin

[49plymouthclubcoupe]

I need to rebuild or replace the dual action - vacuum assist fuel pump on my 1949 Plymouth Deluxe.  What are my options these days?