I was in Tractor Supply in Brentwood NH today just looking around. On the Clearance Shelf they had a bunch of these Electrical Outlets for your safe. They were marked $24.99 and then $9.99, but the shelf was marked $2.99. I grabbed 6 and there's probably about 8 left, in case anyone is interested.
Stack-On | Products | Electrical Cord Accessory Kit
Stack-On | Products | Electrical Cord Accessory Kit