I was curious so I hit google for a bit. Very interesting design. You're correct it's not the exact model but it had to be something under the same manufacturer given the color, case style, fans, switches, drive cut outs and the door mounting holes. Of the two I prefer the one you have for it's layout.
It looks like they also offered a rack mount version around the same era but with far less storage space.
The Topower TP-1945
http://www.dansdata.com/tp1945.htm
The company still has a website up but it's hard to find distributors that carry any of their products. It looks like they shifted to more generic case designs but do offer one server chassis marketed as a "raid case".
The TP2000-C which supports 14 x 5.25 drives. I can't find anyone that sells it or any mentions other than their site.