my experience about the official case : I never saw this item on discount !
I'm living in Europe too and the options... are not there !

On Amazon (Europe), you can buy the official, but strangely, amazon US offers another model, the

Hermitshell Hard EVA Travel Case Fits Steam Game Controller.

( https://www.amazon.com/Travel-Steam-Controller-Accessories-Hermitshell/dp/B01EA9WYSC )

It's cheaper but the conception of this carrying case isn't perfect : you can switch the controller on by mistake !
sadly, the official carrying case seems to be the best option, but it's never on sale......

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