In addition to what OmegaStarScream said you can get 1.5 and up here:
https://github.com/bitcoin/bitcoin/releases?after=v0.2.0Keep in mind they will not sync to the network due to network & protocol changes.
Also, compiling them at times will drive you nuts, they rely on a bunch of old packages that are no longer around. I actually had to download gigs and gigs of old linux CDs & DVDs to get what I needed and their dependencies.
Stay safe.
-Dave