I've had a lot of issues with the safety sensors for my garage door opener, most of which had to do with loose or broken wires leading from the opener to the sensors. It's been extremely frustrating when out of the blue the garage door won't close because even though the sensors are aligned, the wire got bumped and now doesn't have strong enough of a connection. So I've been searching for wireless sensors but wasn't really seeing anything come up. Do wireless sensors even exist? Or would that violate whatever code exists about safety sensors?
I've never seen them. The battery maintenance would be a hassle anyway.
Route and secure your wires appropriately to protect them, and build wood or metal guards around the sensor area to prevent careless people from banging into them. A simple block alongside the unit should do unless your home is populated by maniacs.