Cool, I have ordered the 8s to see how they go. I think I have been using 7s so I guess just trying a couple and seeing what I like the best is probably a good idea regardless.
I noticed once when I was looking for suppliers of those plugs that most listed them as being suitable for various UK models of card (Escorts etc) so it may just be that there isnt much demand in australia for them and they substitute with something that is more common over here...really not sure what the go is. Also the place I ordered them from is a place that specialises in hard to source parts...and I couldnt see any when I was doing the rounds of local stores...I guess its just a regional demand thing...