Letting domains expire could be a major security risk...are you one of them?

[Jeffery]

Here is something that is useful when you want to research dropped domains:
Wayback Machine Downloader

Very handy when you want to rebuild or repurpose a website that is not your own. There is a demo that gives you 200 free files if you want to take it for a spin. The way it works is if the website is listed at Wayback Machine then you can download it.