Controller mount recommendations for surface duo

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Is anybody using a controller mount with their surface duo? I've been looking for one and the only one I can see that might work is the one by otterbox. But I only say that because they don't specify anywhere how wide is a device it'll work for. I'm going to hand to take a long flight in a few months and that would sure make it a little less unpleasant. I know you can use one of the screens as a controller with some of the gamepass games but it'll never be quite as good as an actual controller.
Thank you for checking my post and I really appreciate any help or experiences anyone has had. Thank you.