If only one, I'd have to make my own, otherwise the two I have are a very nice set for different seasons. But to have exactly what I wanted, and if only one, I would have to make it. Dual trekking pole supports, but not like the notch style, it lacks triangulation of the supports, those have too much wasted space inside in my opinion. Plus some spicings from Roger C's nice tunnel designs and methods he was nice enough to share with us, I think.
A zippered entrance zpacks style hexamid, using a second pole somewhere, and/or some short carbon fiber poles, with a built in floor bathtub floor, not that netting stuff, would be closer to the idea I think, but with less guylines required to maintain the structure of the body. ie, nobody makes it, but several people make parts of it.