i've got a lot of supergirl comics, a whole row and then some haha! i think i have like... every major volume from the silver age up to now? i'm not sure on supergirl history though so i might be missing some stuff but i think i have all the major stuff. older stuff less so, but that goes for the whole server, i'm severely lacking in silly golden/silver age stuff haha.

oh malagraphic has some beautiful woman of tomorrow & world's finest icons, and i'd look around at comicbook_icons as well, they have a supergirl tag thankfully. also if you have the time to kill you can look through prey, there's a LOT of comic icons there but fair warning a lot of them are uncredited fanart icons i believe