No, i don't have such a shader. What's the problem with the textures? I would think that simple down/up shift can do the trick, can't it?
About the entry on mobilegameengines: It's an opinion and based on the metric that one uses to measure project size and the fitting of a certain technology, it's perfectly fine to me (in addition, it doesn't state that it's limited up to medium sized projects) . Feel free to contact the site admin to get your own opinion added. I would greatly appreciate it...the more, the merrier.