Recently I found that Silverstone case - Milo ML02MXR Multimedia MoDT Slim HTPC / Desktop Case. It’s shipped with fanless 120W Power Supply, multilanguage LCD, IR, remote control and iMON media center software. It’s situated for Micro ATX, Mini-ITX and DTX motherboards. It’s slim (just 82mm tall) and stylish but not cheap - $249.99. Anyway, I hope that you’ll get exactly what you pay when you decide to buy it.
iMON VFD display is included in one of the most popular cases for HTPC - SilverStone. It’s supported by LCDProc. So, there is no any problem to install its driver under Linux. Moreover, MythTV - open source media center front-end allows to display on iMON VFD some useful information such channel number, movie name etc. For all who needs more Linux offers a flexible interface to the all devices in the system. As example, let’s see that Perl script which simulate graphical equalizer on iMON VFD display. I run it in my media center based on SilverStone LC20M. It works fine but unfortunately it doesn’t display real data. At least it may give you some ideas.