Three Gang Completely Blank Switch Plates with No Holes
Boho Floral Blank Wall Plate 1 Gang No Device Single Blank Switch Plate Outlet Covers, Mid Century Tropical Leaves Decorative Wall Plates, 4.50 x 2.76 Inch - Amazon.com
Snap-in Keystone Blank Insert for Wall Plate White - Walmart.com
Eaton 2-Gang Midsize Blank Wall Plate, White in the Wall Plates department at Lowes.com
1-Gang Jumbo Blank Wall Plate, White (10-Pack) at Lowes.com
wiring - Why do I have a coax splice behind this blank face plate? - Home Improvement Stack Exchange