Funny thing is, I never saw any and the first time I did see one was on the internet. From what I have seen they actually looked pretty well made, so who knows. I suspect the demand for cheaply made, crappy "gamer" cases that are made of tinfoil and brittle plastic - crap like Xigmatik - saw them off as it did so many others. Look at XSPC, they practically withdrew all of their higher quality cases, such as the H2... Which I was buying parts for when they took it off the shelf, assholes.
I always wonder what happened to my favored case maker, Kate & McKenzie (Web Archive Link) as they were used by many organizations until at least 2008. Hull City Council's standard Pentium III used their Soho 3 models and Stone (A UK OEM used by Colleges and some council offices in later years) used them exclusively. At least, so far as I know. They were good cases, they looked plain and they could take a beating before they started breaking apart. Always wonder what happened to Mitac as well, their cases weren't as good and they made the occasional idiotic design choice, but they were cheap and they did their job as well as they needed to.