By Topcow, store exclusive, both regular & sketch are sold out.
I thought also that the Hardcore sketch was a Topcow store exclusive, but to my surprise when I went to "Midtown Comics" on Wednesday to pick up some books, they had one sitting on the shelf next to the regular Hardcore #1's. They had it for $10, so I asked one of the employees if they had more, but he told me they only got two copies and I was holding the last one. We both thought it was strange since they had a ton of the regular cover and just got two sketch covers. Of course I picked it up for $10.
they may have just ordered it from Top Cow.
I doubt they'd ordered straight from Top Cow since they were shipped with the regular books, but who knows, maybe they did...