There are 2 repositories under punkrocks topic.
Awesome 24px (and 28px) Downloads - Free Pixel Art Collections in the 24x24 (and 28x28) Format - Punks, Apes, Cats, Dogs, Rocks, And More
D.I.Y. Rocks (Incl. Punks & Maxi Biz) Collection Starter - Yes, You Can - Wen Deploy? Wen (Free) Mint (First-Come/First-Serve)?