How to see items that are on blanket and not sourced through blanket?

We are on 12.1.3

I have items that were in the store becasue they belong to the categories in that particular store.

I create a global blanket agreement and the items are updated in the store with the blanket sourcing details.

We cannot always buy from the blanket supplier, so we need the option to have the same item appear with it on the blanket and sourced, and also not on the blanket so it will not source automatically.

How can I get the same item to show twice? Once sourced and once not sourced in the same store?