The seller has almost perfect feedback with only one negative. I can't find what it was for (too old), but I can't see it being about a fake patch. He also hasn't sold any patches that look questionable. I would say real.
I say that it is probably real the seller has great feedback and has been around for a little more than 3 years. And if you buy it and still are not sure I say send it in to get graded and see if it is authentic.