From Amazon
Avery Zweckform L6011-100 self-adhesive label - self-adhesive labels (Silver, Rectangle, 63.5 x 29.6mm, A4, PVC, Polyester, Matte)
Conrad Electronic
Avery-Zweckform L6011-100 Nameplates 63.5 x 29.6 mm Polyester film Silver 2700 pc(s) Permanent adhesive Laser printer, Copier, Manual labeling