Design Expert 6.0.4 or 6.0.6

I have been looking for Expert Design trial version 6.0.4 or version 6.0.6. I couldn't find anywhere. Stat ease has only the latest version 7.1.5 to download. Is there anybody kind enough to inform me where I can find any of the two trial versions? Is there anybody who has any of the two trial versions who is willing to let me have a copy of? Thank you in advance.