Does anyone know where I can get the replacement stickers for the bottom of the XBOX that say warranty void if broken?

and why, would you need a replacement?.....sounds like you're up to no good

Call up MS, maybe they can send you some complimentary ones

Sounds to me like maybe you pooched your Xbox while diggin around in it, so now you want to return it and get a new one.... Yeah, I highly doubt M$ would be willing to help you pull jack moves on another box.