Or you can just use the eggs to keep some

So now if you frantically need Endermen, this mod Minecraft Resource packs  will have you covered. Since so many things rely upon Ender Pearls, this mod will allow you to get them and never have to vacation resort to using creative mode. friends around.

The Wood Converter is a saving grace for anyone looking for a certain kind of wood only to come up short or not finding the right type of trees and shrubs around. 

 In a nutshell it gives you to pattern minecraftio.com/d3-commands-mod/     through all different wood types just by organizing 9 in a crafting desk. The order goes the following: Oak -> Spruce -> Birch -> Jungle -> Acacia -> Dark Oak -> Oak.

So essentially this mod gives you to get any kind of wood type you could be looking for by just crafting it!

If you have enough diamond jewelry and emeralds, you can also just art Ender Pearls minus the middleman of getting rid of an Enderman. This formula requires the utilization of 4 gemstones and an emerald plus 4 shards, so it is  D3 Commands Mod quite expensive but if you hold the scratch and need the pearls then it's well worth the trade off.