Underwater housing for Sony RX1R2 ?

Any chance on underwater housing for Sony RX1R2 ?

can't seems to find

i want to bring it for diving up to 30m

I don't think one exists; there is just no point in spending thousands to house this camera, as it can't really work underwater. The 35mm fixed prime lens is a very bad fit for underwater photography - it's too short to do macro, even with close-up lenses, and it doesn't look like it'd work with wet wide lenses either - for one thing, the focal length is also wrong for it (most of them target 28mm, some target 24mm, and a very few target 60mm macro), and for another, the large front element suggests a deep-set entrance pupil, which would likely produce vignetting on top of the already-narrow angle of view.

Basically, underwater, you always want to get as close as possible to your subject, and then get a little closer still - every extra inch of water between the subject and your lens degrades image quality. This means using either fisheye or ultrawide lenses to shoot larger subjects, or macro lenses to shoot tiny critters. RX1 fits neither of those niches.

For snorkeling, you could put it into a plastic bag and take a few snapshots (before the camera eats some salt water and dies), but for diving you'll need a different camera.

Agree that I have also never heard of such a housing. Regarding 35mm, it has its uses (I mostly use a 35mm f/2.8 on a Sony A7R ii underneath a dome port, which is somewhat similar to your intended set-up. Still, a fast 20mm or 24mm prime might be more versatile, in particular for night dives.)

I understand your reasoning for the particular camera body: Small body, high resolution sensor, fast lens. Unfortunately, the layout of mode dial and the front switch are too different from the otherwise related RX100 series. The aperture ring would make the housing quite expensive and also difficult to maintain within the small confines of a compact camera housing.

However, consider that you have an increasingly rare, still highly priced, niche street camera. Is exposing this beauty worth the risk of a leaked housing?

If you like the feel of the RX1, consider a used, faster lens RX100 series model and according housing. The longer depth of field of 1" sensors are in my opinion more suitable to UW photography anyway and if you bring along decent lights/strobes, you can even yield some decent shots in the dark...