I don't call this expensive: https://www.myappliances.co.uk/econolux-art28405-60cm-spirit-headroom-hood no idea how good it is, but must be better than nothing and banging your head on it whilst cooking.Difficult to get this right but like Inspector, I'm a six footer (Wife is much shorter) and often catch my head on the corner of the hood, which is b-painful.
I should have gone for the 45 degree type but too late now! Trouble is they are so much more expensive, not that I can see why.