She does have a life, you know. Settle down.
It's not very difficult to work around, just have something in your game that uses a placeholder graphic, and then when you get the real deal put the actual file in with the same name. It's pretty easy, and not very stressing unless you want to release your game any time in the extremely near future.
Of course, this is coming from someone who has never done any graphical recourse work in their life.