I'm a quadriplegic and need IR remote control of my X10 modules. I use a MX-450 Universal remote with an IR543 Infrared controller to control my x10 lamp and appliance modules. I've had the IR543 for more than 15 years. It's beginning to wear out so I figured I better replace it before it dies. I looked yesterday and it appears its been discontinued. Is there another IR to X10 controller available?