This is a great point. I work on tools that would be perfect for this: Crowdtilt[0] and our open-source tool Crowdhoster[1]. This situation specifically reminds me of a Crowdtilt campaign that launched here on HN after the Internet Archive burned down[2], so I would be very happy to help.
[0]: https://www.crowdtilt.com/
[1]: http://www.crowdhoster.com/
[2]: https://www.crowdtilt.com/campaigns/please-help-the-internet...