Item Branch/Location manual classification

We are trying to add an Item classification either at Branch or Location level, where the user can enter manually additional information (text - no special characters, etc.).

When an Item has a Lot assigned, we can use the fields LOT1, LOT2 and LOT3 but, is there a field(s) available to get the same classification done when an Item does not have any Lot?

Adding a Text Media Object does not work for our purposes.

Any ideas?

Thank you!