I looked around for ones in German for years, and finally found them being sold on the Peta.de Web site. I got criticized for buying them (the organization is pretty controversial here, too), and asked why I didn't make them up myself on my computer! I hadn't thought of that.
They're definitely a godsend - we had a fire here back in the 80s, and just by luck I had stickers I'd bought in the U.S. on both sides of the house. My husband was out walking our dog, and I grabbed our cat and ran, but our tenants' dog was inside. The fire fighters commented on what a good idea the stickers were.