In 2016 when I shopped for a Streetwise map of Vienna for an upcoming trip, I was shocked to see it listed for over $60 on Amazon. Other maps were similarly priced. I went online and learned the company was giving up. Rick sold out his inventory and does not carry them any more. They slowly disappeared from our local bookstores.
So imagine my surprise when I looked on Amazon for an Amsterdam map and found a Streetwise map for $6.99 with Amazon Prime. Googling once again, I learned that Streetwise was recently bought by Michelin North America. My shiny new Amsterdam map is dated November 2017 and says it was Printed in Canada by Michelin USA.
Apparently they have not done many cities yet, as Copenhagen is over $100 on Amazon! Indeed Amsterdam is the only one I found at regular retail when browsing on Amazon.
As for Vienna, I was able to obtain one by trading one or two of my lightly used Streetwise maps with another Forum member.