I was happy to find this album of Nicolai Roslavets' second, third and fourth piano trios by the German group Trio Fontenay. I've enjoyed the album, available on Hoopla Digital. I particularly liked the third trio.
I was curious why the trio had chosen those trios of Roslavets. Well, it turns out that they are the only ones that could be recorded -- the first and fifth piano trios are lost, according to the list of Roslavets' works on Wikipedia.
This sort of sad discovery is not unknown for the composers I am interested in. Alexander Mosolov wrote five piano sonatas, and I've listened to four of them again and again, but the third has been lost.