I haven't been able to find one - I think they stopped making them 5 or 6 years ago.
Is your heart set on dual monitors, and do they have to have big pixels like the 19" 5:4 monitors did?
If not consider the
Dell Ultrasharp U2711 (although you'd want a better price than that). That has the same number of pixels across as two 19" 5:4 monitors, as well as 40% more lines. Text will be smaller before scaling though.
If you just want big, get a suitable 32" Full HD TV. That has 75% of the pixels across as two 19" 5:4 monitors and 5% more lines.
Alternatively, try three 21.5-23" monitors rotated into portrait mode. They probably won't take up that much more space than two 19" 5:4 monitors.
OR buy two of the cheap Dell 24" you linked to and use one or both in portrait mode. They have the advantage of 1200 lines compared to the 1080 norm, so will give you a more useful 1200 pixels across in portrait mode.