You can purchase via Amazon.com the Hard cover or Soft cover Kuntres Shmoi Shel Moshiach. Or you can still download and share for free the PDF version on the download page.
Click Amazon.com link for purchase: https://www.amazon.com/dp/B09M59K868
Copies are also available at all fine Judaica stores including Judaica Place of Flatbush https://www.judaicaplace.com/shmoi-shel-moshiach-english-edition-hardcover/9798985221107/