Alternative endpoint device for 1642HDC?

I have (and enjoy) my whole home DVR package (Cisco/Contour), and I currently have seven TVs connected to it via the Cisco 1642HDC boxes. I am paying a good deal monthly for rental of these devices, and I just wanted to see if there is any other device I can use to access live TV/DVR content for at least some of these TVs. 

I have XBox 360 or XBox One at four of the televisions, and two of the TVs are not used that often. If I could find some (relatively) cheap way to get these devices connected to my DVR, I would be really happy to knock down my monthly bill. 

I have read a little about MoCA, and that's what got me wondering if I might already have most of what I need. I appreciate the feedback.