Any clues on how to get replacements for these things? Moved house a few months back and we have a double garage with a rolling door. There is 1 fob per door but they are not the most solid of things and we would like a replacement that we can hang on a keyring. I'll try to get a picture of the manufacturer (although it's an Australian make for some reason) and a pic of the fob. I've looked on ebay but all I can find is this kind of thing, and I've tried it to no avail.