CF Version Download? Specific version?

This is not really "help", and this might seem kind of stupid, but is there a way of downloading a specific version of CF? Like can you download a ZM patch of CF right now? Is it possible? Or, can you "hack" the client to go back to the version you want?
I am asking this because maybe if I could download a previous version of CF, maybe I can use patched hacks. For my opinion, I don't think it's possible, but I want to mostly hear from you guys.