Hell is a b-side from Ten Thousand Fists and Dehumanized is a b-side from Believe. Ok, well there out there on the internet, so do you're best and find em.
Well if they're available on the internet, they've obviously been released in some form or fashion, haven't they?
I believe these tracks are featured on the Stricken Singles, as there are two versions. They may also be bonus tracks on a limited edition of the album.
Both of those tracks were released on the Stricken singles. Monster is going to be relased on iTunes as a bonus track when you buy Ten Thousand Fists.