http://www.hergo.com/index.asp?category=10&xsection=124&xview=a Here's one I hadn't seen mentioned on this site. They don't have prices on the web, but I got a quote for $355 (+$20 shipping). Unfortunately, they're only compatible with 75 mm VESA mounts, so if you have 100 mm, they have to add an adapter, which is about $20 per monitor.