I saw a post from Texas Media Systems in Austin that they sent in their entire retail stock of GH4's for the "fix". You might call them and ask if they have any with 1.1 and the fix. They are supposed to be a very reputable dealer.
I just sent mine in for the "fix", shipped it yesterday. I understand when they come back from that service they will have v. 1.1 firmware, mine still had 1.0.