There are a ton of aftermarket wireless controllers for remote valves but they are not exactly for this application. It would be nice to see a 2 or 4 zone wireless remote valve, even one that could connect to a water faucet. Where I could use my controller to control non-wires valves. This could also be used to control other things like low voltage lights and such. If there are not any plans to build one then I guess I am going to break out the pcb boards.
That would be fantastic, but I have not found one so far (and almost done running more wires for new zones). If an outlet was nearby, that would sure make it easier. Off hand, it seems like couple of single board computers (Rpi, Arduino, whatever) with (wireless) network connections, relays, enclosures, and power supplies could pretty easily to the trick.