Banner Creator/Generator script or website design wanted

[banners]

I am currently in the market to buy a script or website where visitors can design and create their own web banners online. I would like to find something a bit more advanced than what I have found online so far. I already have a domain but would be open to the right site that is already developed if needed. Feel free to message me if you know of or can direct me to a good already made script or are capable of designing said website/script. I am looking to do this at a reasonable price.