Just require them to supply the crashed hard drive itself. The data is still there, and fully recoverable, unless they have taken extraordinary measures. Which, if so, indicates criminal intent to destroy evidence. Either way, get the crashed drives.
Ahh, nevermind. They got rid of the evidence.
“The damaged hard drive containing ex-IRS official Lois Lerner’s missing emails was disposed of more than two years ago, the agency confessed on Wednesday.” — http://www.dailymail.co.uk/news/article-2662577/The-IRS-THREW-AWAY-Lois-Lerners-hard-drive-containing-incriminating-emails.html