Well, it happens. Light bulbs blow. And your headlight doesn't look exactly mint. The Australian unit is rather inexpensive. And from the look of the photo, I imagine that the reflector does not look that great either and replacement is not a bad choice anyhow even if it was a non-sealed unit. If you want the identical setup as an OEM non-sealed unit, get the European part. Aside from that, there are lots of aftermarket units available at a much lower price--which seems to be your main concern. Again, go for the European specs when buying an aftermarket unit if you want to keep your parking light.
A sealed unit lasts me for many, many years and miles. And the reflector seems to hold up a lot better than on a non-sealed unit.
