Automator: Archive a folder, whilst excluding certain files

I am trying to create an automator based workflow whereby I create archives of folders but exclude certain files from the final archive. I would also like to specify the files or folders to exclude (e.g. ".cvs" or ".git" or ".psd" etc). Here's how I have currently tried to do it, but cannot get step2 below working: 1. I specify a folder to scan and archive. 2. Automator/script recursively filters out certain files which I can specify (e.g. ".cvs" or ".git") 3. Automator creates an archive of the remaining files from step2. Im certain there must be an easy way of achieving this with automator - any assistance would be appreciated.