Oh darn! I was hoping that was it because it had two screw holes in it, so I thought it was different than the one in your images. I will definitely post if I come across anything else while I'm haunting the web.
There's no chance it's slid inside a box or somewhere weird is there? Perhaps they found it while moving it and tucked it somewhere? Or if you called the company, maybe it's wedged somewhere in the box?