What do you mean by Goth btw? Are you into goth specifically or really just any "alt" style girl with dyed hair, tattoos and piercings?
It really depends on how much you are willing to travel and how much you are willing to spend. For example, Joanna Angel has started advertising, but I bet she is out of our price range. There are a few options in NYC I can point you towards, and there is one girl in Philly I've had my eyes on as well, however these girls are all $500/hr and up.
Really your best bet is to search in Brooklyn. Just try Tryst, search within 15 miles of Brooklyn and use filters to pick providers with tattoos. Outside of that, I've noticed certain cities tend to have more providers with alternative styles. Cities like Philly, NOLA, Portland and Denver seem to attract alternative providers, the south and parts of the west tend to produce alternative/goth providers. You can check these areas and see if FMTY works (if in your budget) or just see if they tour.