While you can look at the makers to see if they make such, the market is driven by what most of the market wants then for the specialty items you see the price zoom past thousands of dollars.
If you attach the wide angle lens onto the camera, then you get what you want and it's "one-piece." Without the specialty camera price and your list of possible cameras gets much longer.
I am a realtor and know very little about digital cameras. I have been looking at digital cameras for a long time and still do not know which one I should buy. However, I know there are some features I would like to have on a digital camera.
First and foremost, I would like to have a built-in, wide-angle lens so that I can take the entire view of a home from the outside and not have to carry anything more than I have to. Also, to add to my wish list, I would like to have either a 2" or 2.5" LCD (since the older I get, the harder it is to see) and last, a comfortable hand grip to hold the camera.
Is this asking for too much?