I've recently gotten into a fairly obscure band that a lot of people describe as a "one hit wonder". Nobody is making merchandise for them anymore as the band stopped making music long ago. There aren't any available listings for shirts online as far as I know. I had the idea that I would make a shirt for myself using an image of the lead singer and text (the band's name and one of their song names). Every site I went on mentioned copyright rules, and so I haven't tried creating the shirt as I am worried about possibly getting in trouble for it. I don't even know who I'd contact to get permission to use the image (especially since the band is no longer active and the lead singer doesn't have social media as far as I know).
Would I get in trouble with the law if I created the shirt with absolutely no intention of profiting from it? If so, who could I get permission from to use the image?