Email trigger when task becomes overdue by "x" hours

Hello, 

I'm looking to create and email notification if a task is beyond its due date for more than 4 hours.  We are using the tasks module under the cases module to manage support requests and want to notify a group of people if it has been overdue to ensure requests get handled quickly. 

I'm somewhat familiar with advanced workflow, and process emails and studio.  I have a couple ideas on the direction to go, but figured someone else has already tackled this.

Thanks for the help!