This tool is easily found at any classic VW shop. The transaxle plug in the Bug is the same size. Check a magazine like "Hot VWs" for vendors.
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.