When BodyGuardz' The Garrison for the new iPad ($50) showed up at our office, we knew it looked familiar: it's almost identical to STM's Skinny 3, and most likely from the same OEM factory. The hard plastic shell is virtually indistinguishable, it has the same tab to hold the case shut, and it even shows signs of the magnet being replaced post-manufacturing. Instead of canvas covering the case though, this one uses faux leather, and BodyGuardz includes…