Signed Spirit of the Tsars

So roughly a year ago came into a signed 2012 bottle of “Spirit of the Tsars” vodka. Was given to me very off-handedly and a misguided google search seemed to show it as a ~$60 bottle. I recently opened it and had a small glass and was amazed at the flavor and smoothness. Began to look this up and found it almost impossible to find as the link for the ~$60 bottle was broken and I now can’t find it anywhere.

At this point I’m checking if I can buy this anywhere else? If no, is this an exceptionally expensive bottle I shouldn’t have cracked open? I’m fairly ignorant to this space so any help is greatly appreciated 😅