There are a dozen tools and hundreds (if not thousands) of techniques to remove it. HOWEVER, you run the risk a damaging such a sensitive part. So, I would second the advice of taking it to a good machine shop. They have the tools, training and do it all day long.I would suggest checking with a local machine shop. They have a bit called an extractor and possibly other tools for this.
I took part of my carbs to the local shop in Austin and they were able to use the extractor bit to take out my carburetor drain plug (which had the hex key pattern stripped so I could not remove it)