Saw your old post while looking for the same thing for a friend.
I share your grief in wanting nice large 4:3 monitors.
Did you ever find anything?
(your old thread was locked, I hope I'm not opening a can of stink)
geeks.com has some 20" refurbs for $100 plus $2 beans shipping right now.
I'm pointing my friend toward this one. But they have a few others.
20" ViewSonic VG2021m DVI 720p LCD Monitor
www.geeks.com/details.asp?invtid=VG2021M-FB-R&cat=MON
They have a few others (20" 4:3) but this looks like the best choice.
All refurbs too, thats about all were going to find these days.
take care,
Dos~

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic