Another option is to take a look at WordArt - 1st one in second row
Type the text for each face and set the 'text wrapping' to 'infront of text'
Angle and rotate each one so that it matches the planes of your 3D object
(Specify No shadow if you don't like that and modify the font and fill to
get what you want) Once you have manipulated the face text iinto position,
group it all, including your 3D object