¿Battery bank holders that are non-cell phone clamps?

You all have seen those [ style phone holders. they work great for thin phones and batteries but not for bricks. my 40,000mAh keeps sliding out because it is too thick for the [ to go around the height.

I’m struggling to find one that grabs the battery from the top and bottom versus the left and right sides on the short height dimension instead of either length or width dimension.

Anyone have any Ali favorites? no need to waste name brand money on a basic batter clamp. Save that for actual electronics.