In case you like any of the artwork I've done, it's most likely available on anything in my on-line shops.
If you're looking to buy a shirt, I'd recommend Neatoshop -- from what I know, they're the best at silkscreen printing.
On top of that, I've partnered with Boss Fight Pins. So far they've released the Keeper from "Evil Within" and Revenant from "DOOM" & "Castlevania" pins are coming. We've got Napoleonian plans, so give the page a follow if you're into this kind of things.