Guys,
My original electric fuel pump was well weathered and not suitable to be rebuilt. I then got an NOS pump from LWD parts, which despite the great 70 year old packaging, needed a rebuild. After a fair bit of searching I found a firm in Michigan that rebuilds Autopulse electric fuel pumps for Duesenbergs. I understand that a Duessie uses three pumps !!
Bottom line is that "Classic & Exotic Service, Inc" will either rebuild your pump or sell you a rebuild kit.
Peter