Update all records using import scenario

Hi

My customer has many cash accounts (50+), when they add an new Entry Type I would like a business event to run an import scenario that will link the cash accounts to the new entry type. 

I have the business event triggered that when a new entry type is created it populates a generic inquiry and triggers the business event. The generic inquiry results are the Entry Type ID and Description.  That is working, the business event runs, and if I hard code a cash account ID in the import scenario the import updates that cash account.

Where I am stuck is how do I update all the cash accounts with the new entry type?  I tried =Every in the source field (that works with export scenarios) but no luck.

Thanks,