rickashay
Explorer
ARB also makes a full breather kit. More expensive than the DIY setup but it's pretty awesome and includes everything you need to setup your breathers. +1 for tidy and professional looking install as well.
http://store.arbusa.com/ARB-Differential-Breather-Kit-170112-P22783.aspx
http://store.arbusa.com/ARB-Differential-Breather-Kit-170112-P22783.aspx