How can I find specific PRO grade gear when CONSUMER grade dominates the search results.
I think your trouble is partly related to using the overloaded, usually inappropriate word "pro" instead of "broadcast".  Marketing departments love using the first word, but when you think about it, that word doesn't describe the type of work, nor the level of quality.

The rest of your trouble may just be unfamiliarity with this kind of hardware, which is rather esoteric and specialized.  For redundant playback with various control options, I think you're probably looking for "broadcast video playback systems", one example of which would be the Grass Valley K2 Dyno.