I currently own this one https://www.amazon.com/dp/B0734XGQZM?psc=1&ref=ppx_yo2ov_dt_b_product_details

I placed an order for my Air75 and the dimensions seem like will fit in this one. Of course, it's not going to be a perfect fit but the excess space is not too much. I bought this case for my Keychron K1 and it works. Once my Air75 arrives, I can let you know if it does fit if you'd like.