Those turned up in some of my google searches, and they're excellent sites! However, at the moment I'm trying to find some kind of analog gauge that can display the temperature to go in either the cd bay slots or actually mount inside the case to be viewable within the case window on the side. So far, that seems like it'd be a VERY custom piece though. Might have to do some customization to some kind of small vehicle gauge or something.
Now thats the spirit
The problem here is most are 52mm in size (maybe too large for your plans) and markings start at 40-50'c, and I know you want temps displayed lower than that, it would barely move at full load lol :P,
let us know how it goes man, I look forward to checking out your future projects