That would be rather hard, seeing as that company no longer exists. You could always try Squeenix's main site here.

I think another sequel would only stain FFX's reputation. I really don't want to see it go the way of FFVII, pumping out sequels and spinoffs thicker and faster than a rabbit pumping out babies. X-2 was tolerable, only because the gameplay was so damn fun, but one sequel is more than enough, especially when the story has closure.

BTW, welcome to the forums.