I was annoyed with kidnapped pawns being super unlikely to ever return.
This mod makes it a 10% chance every day to generate a "Save Hostage" quest, as long as there is no other quest active that will increase your pawn count.
The source can be found at [url=https://steamcommunity.com/linkfilter/?u=https%3A%2F%2Fgithub.com%2Fknollsen%2FRimworldMod.BetterKidnapping]https://github.com/knollsen/RimworldMod.BetterKidnapping[/url].