Found 27 Cover CC0 textures in library

Book Pattern
Carpet Floor 2
Carpet Floor 3
Carpet Floor 5
Carpet Floor 5-1
Casino Carpet 3
Casino Carpet 4
Forest Leaves 03
Grate 001
Manhole Cover 001
Manhole Cover 002
Manhole Cover 003
Manhole Cover 004
Manhole Cover 005
Manhole Cover 006
Manhole Cover 007
Manhole Cover 008
Marble 14
Metal 027
Metal 028
Metal 029
Roof 8
Snow Covered Ground
Wallpaper 11
Wallpaper 15
Wallpaper 9
Wood Fine 23