http://polarbearsos.org/resources.html

Order NRDC "Unplug for Polar Bears" and "Turn Off Global Warming"
stickers for chargers and light switches by emailing: polarbearsosinfo@nrdc.org
Be sure to give your mailing address and how many sets of stickers
you need (each set contains six stickers, 3 each of "Unplug for Polar
Bears" and "Turn Off Global Warming").
Supplies are limited so please keep your order to two sets, unless you
have a special need for schools or institutions.