I can recommend to just use a NZB search engine for it (during Black Friday deals you can get a for life account for 10-30 EUR). Combined with a Usenet block server (also available cheap during sales), this should not cost you much data or money. And you can use it for Sonarr/Radarr as well, if you want to burn some more data.

Speaking of searching, does Qwant support dorks (no pun intended)?