Metal Ceiling Blank Up Cover 5 Inch White Round Ceiling Cover Plate with 10 Mounting Screws to Cover Round/Octagon Box Openings in Ceilings or Walls (3 Pack, 3.5 Inch Holes Spaced) - Amazon.com
RACO 1-Gang Round Metal Electrical Box Cover in the Electrical Box Covers department at Lowes.com
Intermatic WP3103C Outdoor 1 Gang Round Box, Clear, Color - Electrical Boxes - Amazon.com
Pack of 2) Airmont Products AP-12066, 5-inch Ceiling Blank-Up Cover with Center Screw, Fits 3-1/4" to 4" Electric Box, Adjustable Bracket for Screw Hole Spacing 1.75" to 3.5", White Metal - Amazon.com
4 Packs 5 Inch Ceiling Cover Plate Metal Flat Round Electrical Cover Blank Circle Wall Plate with Screws Ceiling Fan Switch Cap Cover, Holes Are Spaced 3.5 Inches, White (For 4 inch
4 Packs 5 Inch Ceiling Cover Plate Metal Flat Round Electrical Cover Blank Circle Wall Plate with Screws Ceiling Fan Switch Cap Cover, Holes Are Spaced 3.5 Inches, White (For 4 inch