Perhaps you could just make a thread asking for one within your region? It seems like a lot of effort to go through to get a directory going for each region, when we cover several countries, and for when we're a self harm site.. not a piercing site.
I imagine doing a bit of googling might help bring up that information if you can't find it by asking members here, a piercing forum might even have a wider breadth of people with more knowledge between different piercers.
We do have a thread about piercing advice,
Piercing Advice- Read Here :), so I guess if there was such demand, it could go there.