I do not know if you have come across this site. It is a great source for legal, free music amongst the taper community of those band which allow that kind of thing. I spent a lot of time during the lockdowns listening to music from the Deadhead and jam communities. Be aware that a lot of it is poor quality but some bands allow very good material to be streamed. I would recommend the areas dedicated to Grateful Dead, Phil Lesh, Bob Weir, Robert Hunter, Dead and Co, Furthur and all the other incarnations of Grateful Dead but also try out Moe. The Disco Buscuits and Umphrey's McGee.