Amazon.com : AMOSIJOY Cat Sill Window Perch Sturdy Cat Hammock Window Seat with Wood & Metal Frame for Large Cats, Easy to Adjust Cat Bed for Windowsill, Bedside, Drawer and Cabinet :
JOYO Steady and Comfortable Cat Window Perch - CatRomance
Fremont: Modern Cat Window Perch | Square Cat Habitat
Rolife Cat Sill Window Perch Lounge Mount Hammock Window Seat Bed Shelves for Indoor Cats No Drilling No Suction Cup - Walmart.com