Can you post the background you used here?
I might be misunderstanding the question here but you want the black backdrop that I used for the wallpaper for my home screen, right?
If so, I posted it in my previous message above (check the attachments; it should have went through; I did it from my iPhone and don't have access to a desktop).
FYI: I got that background back when I was still using the 4, so it's old and I don't have the original anymore BUT all I did was literally Google "black background" and you get a bunch of black backdrops. Nothing more special than that.
EDIT: I'll try to resend the background again: