Man, reddit is such a janky website so ill put the link here in the comments i guess

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Since no one makes an M30 case I did some shopping around and found this Fintie branded sunglasses case that is the perfect size and shape. Since it had extra space in the lid I cut the stitching, cut up a car accessory net to make a pocket and sewed it all back together with an awl. Turned out pretty good.
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[https://www.amazon.com/gp/aw/d/B07SPCC19L?psc=1&ref=ppx\\\_pop\\\_mob\\\_b\\\_asin\\\_title\](https://www.amazon.com/gp/aw/d/B07SPCC19L?psc=1&ref=ppx\_pop\_mob\_b\_asin\_title)