Have you guys seen this guy? He has a rather popular Youtube channel and does a lot of Linkin Park covers as well as original songs. I find he sounds a lot like Chester. Here's one of my favourite's: http://www.youtube.com/watch?v=dG9JNmKL6Mg&feature=related
That is Alex. He is amazing. This is my favorite of his songs: http://www.youtube.com/watch?v=K0VwaIQHyaM&feature=channel_page