I saw that CoolAir thing on Amazon. There’s lots of identical versions of it, all for just over twenty quid. The basic principle (a fan blowing air that’s been cooled by some water) is common, and there are lots of different sized fans available. The reviews for the ones like CoolAir are pretty mixed (the article above is clearly a promo piece, so I’d be a bit dubious of its claims). But for twenty quid it might be worth a punt.
Dan