I just searched around OP, you're going to need a step down/step up ring and use a fisheye thats not the same size as your camera. 43mm seems like the best for you to go up to. Now the problem is, after some searching, i don't think 43->35.7 exists.
after looking online, i can tell you that your camera doesn't have filter threads, the light makes the front opening not circular.
One thing you could do would be measure the diameter of the opening by hand, then buy a XXmm to 43mm step up ring, you would have to cut part of the threaded area off so that it clears the light, and glue the step up ring to the camera. this would make it so the light can not be used. Make sure the XX size you pick will be as snug as possible so that it will be centered better when you install it.
There are add-on lenses at all for your camera, the ONLY non permanent way to add a lens on that camera is permanently adding a filter ring.
measure across across the middle of the lens opening, what is the inside diameter? If you tell us the correct diameter, we can point you in the right direction, to get a filter ring or step up ring, and a fish eye/wideangle that will fit. Moddifying the ring is very easy, all it will take to do is a dremel with grinding wheel. Depending on the size of the opening, you may even be able to do it so the light can be used when your fisheye is not on the camera