Was in Best Buy last week and found an open box Monster Power 3600 MKII on the shelf for $149. That was a $350 discount of the price. Obviously, it's just the unit with no accessories. Does anyone know where I can find rack ears to fit this piece? I tired searching Monster, but appears they don't sell spare parts. If there is a place that sells universal rack ears, that would be great also. I'll be mounting to a Middle Atlantic ERK2720. Thanks in advance.