I will be visiting where I grew up (in the Northeast U.S) at the end of the month, but I was part of one of the last historically Russian households in a very large Polish/German community (it is like putting a mouse, a cat and a dog in a knapsack), so I would probably need to travel to the city to find anything, but it is dangerous, so I will probably just stay with my grandmother.
You can mail order from owners/collectors on Discogs, nearly 1000 copies listed for sale, reasonable number of those sellers are US based. If you're not familiar with Discogs, it's rad. You can view a selers rating and all the details regarding the condition of a specific item they're selling and they offer buyer protection, as well as ratings of your own experience with the seller and item. https://www.discogs.com/
Likely a number of those aren't what you're after, the language barrier/translation thing can be a pain to navigate and I'm not personally familiar with the artist you mentioned, but with a little work I'm certain you can find something on Discogs.
Thank you. It is mostly older stuff (1960s and 1970s), you might know the man as "The Trololo Guy".
Seeing this pop up reminded me that I watched it at the time it was airing pretty much just because everyone else was, and then I never thought about it again. Dragon Maid left 0% of an impression on me and I'm not even biased against "slice of life"/nothing happens light-toned, comedic anime.