The manufacturer has a very good website with a special search for finding a distributor:
I hope this link will work for you:
http://solutions.3m.com/wps/portal/!...C_IcFQEAHTt83Y!
If not here are the pathways to get to the product on the 3M website:
(
http://solutions.3m.com/en_US/)
United States > Products & Services > Manufacturing & Industry > Construction & Architecture > 3M™ Colorquartz™ Products > Colorquartz Crystals
Then: Where to Buy