Michael Bourgon has a script to get information on statistics updates for stats based off of indexes:
Quickie, based off an earlier post. (http://thebakingdba.blogspot.com/2012/02/tuning-statistics-when-were-they.html)
Get the last 4 stat updates for every statistic based on an index. The filter is on the auto_created; flip that to get all the system
This does use the DBCC SHOW_STATISTICS command, which reminds me of a rant (though not about Michael’s code; it’s about the need to use this DBCC command rather than having a nice DMV which returns all of the relevant information).