I tried a random search for inverted crosses and female faces- yeah nothing like his t'shirt came up in the results.
Could it be something from a horror movie or an occult artist that he's into? During the Rock Allegiance show at the meet n greet in Atlanta he made out like a bandit with t'shirts and gifts from fans so honestly, there is no telling where he got it. For all we know it could be some random shirt from Hot Topic.
I hope you are able to track it down - it does look cool.