I found some super thin (0.001") reflective tape but so far only found being sold by the case
3M 8437 Metalized Film Tape Silver about $70/roll
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.