There are none except for rebrands which are just as pricey. Hence the price. A great alternative in my opinion would be a 21" CRT. The ones like Sony F520, G520, G500, F500 or rebrands by Dell are excellent. There are also 21" models by other brands like Mitsubishi. The only thing they lack (at least the Sony models) in comparision to FW900 is widescreen and sharpness (not F520 and F500), but they have better screen coating. And some of them higher refresh rates. And they cost just a fraction of the price. You can play 16:9 or 16:10 letterboxed on them if you need to.
If you can find a 21" these days I would say grab it. Craigslist $10 (+40 mile drive)