Is there a way to shuffle content from a specific Media bin?

Brief outline of setup - 13 Qs in total. Q's 1 -12 each have 6 Movie Players in, each going to a separate Projector, each going to a separate Stage. Each Stage is a separate pyhsical monitor. 

All Q's identical in layout but each is looking at a different Media Bin and shuffling content from that bin. 

From Q 13 -a pyshical trigger is pressed which selects a Q1-12 at random and each of the players then select content from the bins they are looking at. Once all content has played through Izzy jumps back to Q13 waiting for another trigger press.

At the moment shuffle actors for the Movie Players in each scene look between a range of numbers relating to the content in that bin 

eg. Bin 7 has videos 15-18 in it, so Player 1 in Q2 looks & selects between that range via a shuffle actor when scene is activated.

All works fine but if I want to add more video files to a specific bin then all the numbers above that get out of sync with players. 

Is there an actor/workaround so that the specific bin is looked at regardless of number range that I've completely overlooked or maybe a way to automatically update the shuffle actors min and max as content is added or indeed removed!

Many thanks,

Si