I can feel your pain, maybe you could be lucky if you found a cancelled pre-order -like Shompola's- at Game, Gamestop and the like.I preordered my PS4 back in February. Then that store closes, and they don't bother to inform me about that until a month later. They say my preorder has been moved to a different store much further away, and they want me to pay 50€ or I probably won't get I on launch day. And I since I'm not about to give money to a store that's been closing shops down left and right, I decided not to do that.
So I go to a different store to see if I can also preorder it there. Turns out they have decided not to sell games any more. That means the 2 big game stores in my area are gone.
I just called the store that has my preorder to ask if I can pick up my PS4 on launch day, and the answer was no. That means I'll have to wait for the second shipment. And then there's still a chance I won't receive one.
I guess call around on launch day to see if any stores still have a PS4 available.
If I were you I'd call just in case.