large mail slots for doors
Safco® Wall-mounted Inter-department Locking Mailbox, 12
Amylove Weatherproof Mail Boxes with Key Lock, Security Locking Wall Mount Metal Mailbox with Slot for Outside, Large Capacity for Mail, Packages, Donations ...
BrickLink Reference Catalog - Inventory of Set 6420-1
Both doors came with Mail Slots. Instead of returning these two doors and waithing another eight weeks, I covered the mail slot openings with your blank plates and sprayed foam between the plates.
Plastic Materials - MISUMI Vietnam
KYODOLED Wall-Mount Mailbox,Large Capacity Mail Box,Galvanized Steel Rust-Proof Metal Post Box,Mailboxes for Outside,15.7"x9.9"x4.9" Red.