Duh! I didn't notice that you're in the land of green coffee. I'm in Australia but even though on Airtronics' site they say they won't provide support to anyone outside the US, they were very helpful when I emailed them a few months ago. But I'm not sure if they'd actually repair/replace your RX, my guess is they'd likely tell you where to go - as in back to either your retailer or LRP for warranty service.

Speaking of green coffee, it's getting to be about time for my morning umm... cuppa... of coffee.