Yes, you can pick up a cheap cushion just about anywhere, but if you want something with impact (and a price tag to match), check out this Battersea Power Station suede cushion by Snowden Flood.
They’re pitched as art as opposed to everyday items, with the idea that they’re "modern heirlooms" that should retain their value in years to come. Crafted from soft leather and suede, the design is laser cut and then bonded by hand to the backing. And if you’re looking for iconic design, Battersea Power Station is certainly that.
Sold with a feather pad and made to order, they retail for £164.95.