Is there such a product as an angle viewer?

[mjs1973]

Is there any product out there that would fit on the eye piece of a camera with a 45-90 degree angle on it? Ok that might not make sense so let me explain. The other day I was taking some pictures of a pond and waterfall. I wanted to get a shot from ground level so I had my camera on a table top sized tripod, sitting on a rock. The only way I could look thru the viewfinder to compose the shot was to sit on the ground, in the mud. I was thinking that it would be really nice to have something that I could clip on the eye piece of the camera so I could stand over the camera and just look down into it, much like you see on most telescopes. I have done some searching on the net and I can't find anything like this for a camera. Something similar to the picture below, but for a camera.

Anyone know of anything like this?
Mike