They do not exist or are all slow and cooked. Much like yours probably. Grab an onn stick. I got em on clearance for $11 a piece. Google TV is the only partially FOSS thing I know of. Get a custom launcher on it. You can cast just like now, only difference is a home screen and a remote (which you can tune to your TV, so you only need the one remote) oh and it's a lot faster than the old Chromecast. If you don't like it, it's $11...