Custom Utility to change all of one hold code to another on a performance?

Hello All,

Hope all is well. 

Has anyone created a utility that would replace (and/or layer) all of one hold code on a single performance with another hold code? 

Something where you would just choose the current hold code to be replace, choose the new hold code to replace it and then the performance.

So if there were say 300 scattered VIP holds on an event then could be bulk changed to Emergency holds or something like that. 

Thank you!

Ian M