I also liked when I saw it, but then I thought: how do you clean the dust?

Pretty sure this is actually just a giant tumbleweed that got stuck to their ceiling (awkward!)

Despite that where can I find it?

Hi Heather - This fixture is by Owen Mortensen and is handmade by him out of genuine tumbleweeds that he collects. You can check out his website http://www.owenmortensen.com/

Many thanks!