I am sure he means the plugs that go into the foam and cover the screws that hold the entire door handle assembly on.
The plug is shown in your diagram, right below #33. There are about 4 of them per door handle.
I don't have any, but I think I know what he is talking about.
Rocky
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.