I tried finding a single stand for my 24"monitors for months, the only one I found and purchased could barely hold them up, and they had to be rotated (Not an option for 3D applications) so atm, I use the stand on my racing sim with 3x 22" screens and I am still looking for something for the 24's or 27's (reasonably priced)

Looks like the only real option is a custom job or multiple arms