My door courtesy light looks to be in the same shape as your- rusted.
I think I found a possbile replacement at
alfapartscatalog.com
Tom
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.