I came across this article the other day thanks to Google alerting me of all things hammock out in the universe.
The new SnoozePal answers the need for a free-standing cat hammock. It’s made of heavy-duty cardboard, enclosing a comfy hammock for a cat to get into and snuggle. This design gives the cat an elevated spot off the ground; porthole windows enable it to keep watch on its surroundings. The cat hammock box is extremely durable and it's hard, smooth surface discourages scratching.Check out the SnoozePal and the ‘Cat Hammock With Wood Stand’ (pictured) at CatAbove’s website. They also sell replacement hammocks so you don’t have to worry if your cat turns the hammocks into a scratching pad.