How to make switched Outlet control on Switched Outlet on opposite side of room
You're looking for a product that works just like industry standard, connected smart switches, but is not industry standard, not connected, and uses a proprietary radio frequency.  

That wouldn't have much of a market, would it?  From what you're saying, it sounds like you see the market as "it's cheaper", and you hope that incompatibility and low feature set would make it cheaper.  That would certainly make it worth less ... but as far as "cheaper", nah, that's just not how production economics work.