the "nuts" on the Bonniville were 3" across the flats, so if yours are the same, maybe you could get plastic wrench from GM
Also found BBS Wheels and BMW uses similair and have the plastic wrench for about $15
http://www.purems.com/Products...BS-Center-Cap-Wrench
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.