can definitely look into doing up a 104, I am just worried about the fit wise, are all the profiles of the different keyboard's plates+pcb of the same dimensions ? etc etc
that's a good question, I know that Filco, Rosewill and soon upcoming CM XT are made by Costar. Here is the trick, Rosewill uses mini USB detachable, Filco has the attached cord, while the CM XT will have detachable USB plug and not mini USB.
I guess when time comes for you to give the 104 boards a shot, for example I have a Rosewill board and when CM XT comes out will have at least few of those in different switches. If you need us to open them up and take measurements we can do that.
EDIT: Imagine how many people would love to get rid of the Rosewill casing just because of the logo on them, also will give Rosewill users to check the mini usb for solder joint failure and they can redoit and add some guerila glue to it to be trouble free for a very long time.