About 3 years back I bought one of the Roomba 530's and it's still going strong (albeit with a new battery and upgraded vacuum bin). Apparently there was a firmware update put out a couple of years back which improves the cleaning logic, the problem is that it involves using a proprietary dongle to do the job.

Would anyone happen to know of anyone in NZ that may have this device? It's a one-off usage so not much point buying one unless it'd be used on a number of units. I got my Roomba off Amazon, as far as I'm aware there's no Australasian agents anywhere (Suzanne Paul's outfit doesn't count).

Any ideas? Far from essential, might be nice though.