Personalize Supply Base OA forms

We're on R12.1.3.

The Purchasing Dept would like access to only a few items on the Suppliers Page.  These are web forms, so in order to prevent access to all fields, we are using personalization by adding the Suppliers menu, but going field by field at the Responsibility level and marking that field as Read Only.

Is there a way to mark as Read Only the entire region of the form?  For instance, on the Suppliers/Organization form, can we mark as Read Only the entire region for Supplier, Organization, Total Employees, etc?  At this point, we don't see how to do this, so we are having to mark every field within that region.