paging mixed result sets

We have an app that displays a merged mixed list of multiple models (“albums”,“books”,“movies”) which are sorted on field called “rejuvinated_at”. This field gets updated when x number of actions occur on each model. So we have a list of all three content types merged together and sorted. The problem is we now have enough content that we need to page these. I can’t think of a way to do paging with multiple models using the built in paging controls. Any ideas on how to attack this?

thanks, Jake