I agree with EFA on this . . . although the fireplace in the example you chose is a gas fireplace, the cushions are much too close to the fireplace.

I'm afraid what you are looking for IS a bit of a niche product - meaning you actually ARE the only person in America that wants one. Frankly, not many people want big open wood burning fireplaces any more, much less multi-sided, for reasons I mention below and others.

The Bay-40 referenced above is the only manufactured wood burning fireplace I am aware of that has the short-long-short configuration you are looking for.

The Europeans get a little crazy with their wood fireplaces (see below), but I don't know that that piece of knowledge will help you any.

There is a way to build a three-sided fireplace using a precast masonry smoke chamber supported from the ceiling/roof structure, which would allow you to have practically any side you want open, but it is difficult to get multi-sided,open, wood burning fireplaces to draw properly in modern construction, so you might end up needed a mechanical assist (fan) to get your fancy 3-sided fireplace to draw properly.

Depending on how badly you want to do this, where there's a will, there's a way.