[troyb]

You should be able to use 5.1.3 which is available here:
http://www.omnigroup.com/ftp/pub/sof...iWeb-5.1.3.dmg

5.1.2 is here if you're sure this is what you want:
http://www.omnigroup.com/ftp/pub/sof...iWeb-5.1.2.dmg