Choosing a Floorstander by Footprint Size

I am helping my mom choose a floorstander with a very small footprint as she downsizes and moves to a retirement apartment.

They don't allow monitors on stands, and the layout of the room and furniture dictates size requirements.

I am looking for floorstanders that are about:
- 36" high
- 5-6" width
- 5-7" diameter

The only two that I have found are:

Indiana Arbour 4.02 (38hz-22000hz, 8 ohms, 90dB)
Monitor Audio Radius 270HD (48hz-35000hz, 8 ohms, 90dB)

The Arbours have been discontinued, though, so hard to find.

The MAs are sold as part of a HT system, but can stand alone. I auditioned them with NAD gear and was impressed with their soundstage and clarity. But they don't hit the bass, and in this situation, a subwoofer is not practical.

Any other speakers I should be looking at? They will be mated to either her current Electrocompaniet components, or more likely to some midrange NAD (integrated, CD, tuner)components. She listens to operas and classical music.