Copper Foil Tape with Conductive Adhesive - 6mm x 5 meters long : ID 3483 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Kraftex Copper Foil Tape [1/4 Inch x 108ft, Pack of 2] Copper Tape Adhesive for Electrical Conductive for Soldering, Stained Glass, Grounding, and Repair: Amazon.com: Industrial & Scientific