slamz - Had my 932 case right here to assist with the external dimensions.

Do note I currently have it stripped down to the bones for painting, but this will get you into the right ball park as we say in the states:

Length = 53.5 cm
Width = 25 cm
Height = 55.5 cm

I allowed just a smidge of dimension on length for the front panel posts and on height for the top plastic fill port / connectors panel currently off my case. This will be accurate to 0.5cm.