Thumb Score: +8 Home depot has defiant electronic deadbolt castle top or square for 29.88 Online or in-store Sold out online. http://m.homedepot.com/p/Defiant-.../205946407 non-mobile http://homedepot.com/p/Defiant-Si.../205946407 It say not sold in stores but they do check or call your local store. San mateo store has a full case located in the light bulb center aisle.