Where can you buy replacement parts for the air-o-sage leg massager need the controller?

You can buy replacement parts for the Air-O-Sage leg massager, including the controller, from the manufacturer's official website or authorized retailers. Additionally, online marketplaces like Amazon, eBay, or specialized health and wellness stores may offer compatible parts. If you're unable to find the controller through these channels, consider contacting Air-O-Sage customer support for assistance.