Quickly find bumped thread

[zagman76]

Is there a hack that will search through any threads that have a large gap in time between posts (user definable). For example: User X bumps thread where the last post was from 45 days ago, and Mod/Admin X does a search for "find posts with a gap of 30 days or more".

If there is already a hack for this (v3.5 gold), please point it out to me! Thanks!