Vendor - inactivate/disable

I would like a way to disable or inactivate a vendor.
We have a few national account vendors where we purchase from a local vendor but pay to one master account. Our purchase orders need to be created to the master national account vendor (parent) but I would like to keep the local vendors/dealer (child) in RTA for contact information and purchase history or at least in the parts master vendor list. Purchase orders could not be created for the local (child) vendor.