At least you found one

I had to make a ghetto adaptor and shop around for about a year...
9V AC 1300ma seems to be a hard adaptor to come across here in Aus. I ended up with a 2200ma, but man it took some patience. Even then, it took another TBer to post that they had found me one.. (thanks iccarus!!)
As I said earlier, you could get away with say 1 amp (1000ma), but IMO you should just get the right one.