I know how in pocket addition! Get "maps for Minecraft PE" and make sure wewe have pocket edition on your device. Use the tafuta function to look for "Stampy's lovely world-remake" hit the download button, and wewe have stampy's world in pocket edition! To find it, scroll to the bottom of your Lost of worlds.
*NOTE: Stampy does NOT play in this world(not in PE) But its almost exactly the same as the one he plays on Xbox!