Space box textures


I’m starting a game project, a space flight simulator like Galaxy On Fire (an iphone game)

But my problem is, I really need “spacebox” textures (space skyboxes), and I can’t find a lot of these… I only have 2 or 3 of them.
Does anybody have a website or a link of a spacebox texture? Or even a tutorial (for GIMP) for making the texture ?



PS: I hope this thread is in the good place on the forum…