Ok this is the best world seed ever. it has the mushroom biome right next to the new jungle biome. the world is amazing with the mushroom biome and the jungle right next to each other. For what you all want the world seed is lost it it amazing. My friend told me about it but he doesn't have a PMC account so im doing this look in the credits for his minecraft username you may know him!

(im pretty sure it works in 1.2.4)

-Bauersa now has an PMC account so go check him out he's really cool!