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look it up on youtube. theres a bunch of tutorials on how to adapt, and you can just buy a cheap 37mm wide angle off of amazon, flip the lens(tutorials on youtube also). the 37mm wide angles come with adapter rings for whatever you need to put it on your camera.
peep hole fisheye for something that small
u like get a peep hole thing, the kind in hotel doors, at a hardware store and some duct tape. Pretty much the only option for such a tiny camera, but atleast you won't waste a ton of money on it
And btw I'm actually serious, check YouTube or google