many shops 'carry' nokian, I called most of those in the state yesterday. Nobody usually stocks those on the shelf in the store, and warehouses are on a serious back order or even say its discontinued.
It is being replaced by the Hakka R, so you're right, you probably need to find used. Plus you need it to match tread depth. Do a web search for Dave Parps of Greer Enterprises, he mifght be able to help you track down one.