Here are 2 "ABY Style" items, a tee & a mug, both done in pixel style. The mug has pixel 'waiting Sonic' & standing Tails with the classic logo. The tee says "Game Over" with Sonic Dies" pixel sprite. The tee is packaged with hang-card at the top, so you couldn't try it on. It's marked as 'small mens'.
But where does ABY Style sell their items?