I got mine here: http://www.amazon.com/gp/product/B00504G0U0/ref=oh_details_o06_s00_i00?ie=UTF8&psc=1
That's about as light duty as you'll wanna go with the CS2 but will do the job.. There's another one with 3 screws in the back but of course it costs more. You can search "center stage bracket" on amazon to see more models.
Crutchfield sells them also IIRC. Since I'm an amazon prime member I usually go with them. My son is lucky, he has two cats but they show no interest in clawing his speaker grills. He has to leave the grills on since he has a 3 year old.
Thanks Stanley. The cats shredded the grill cover for my Velodyne, removed it - but they have no interest in the sub speaker. Knock wood. Thanks.