wardl

Hi, Just got a 4.1 system with my new PC and want to remove the 'feet' that come with the subs and mount the 2 rear ones on a wall, I notice a slot in the bottom where 'something' could slide in. I looked at the web site, but see no 'accessory' or 'options' page. so... I'm asking here, is there any mounting HW for Promedia 4.1 subs abailable? PS also, is there a white grill available? Ward