Parts:
1) Oasis 360 Lockable Mailbox: Lowe's or Online
2) Qty 4 - 6; 10 X 2 1/2 screws (Deck Screws work well)
3) Qty 4; 1 X 3/8 Carriage Bolts
4) Qty 4; 3/8 nuts (screw onto Carriage Bolt to make sure of sizing)
5) 3/4 X 9.5 X 15 Plyboard or other hardwood - Lowe's/HD sell small sections that can be cut to this dimension.