Set Entitlements to non-requestable if no longer in target application

I have a requirement to set entitlements to non-requestable if no longer in the target application.
In group aggregation for the application I can check the option “Detect Deleted Account Groups” and that will remove the entitlements in IIQ but I don’t want to remove them… I just want to set them to non-requestable.
Any ideas on how to accomplish this?