Here is a seed for the mooshroom lovers. The seed is 727799470814348
Created with small seed and large biomes.
You spawn on the west side of a small island with trees, if you cross to the east side you will see the mooshroom island, it is in the center of spawn map. The mooshroom island is about 300 blocks wide east to west. There are several ocean monuments and other large islands around the seed border. Check it out and let me know what you think or find