Tin,
It's just banned in Tasmania, where I live (the island that's shaped like an apple off to the bottom right). Fishery is a big industry here, and according to some nutcase legislation, they think that if imported uncooked fish got into the waterways here - like a jar of rollmops falling off a truck into a river - it could infect and affect the local fish causing chaos and doom....Crikey! its a load of...hmmm...codswallop shall we say. But yeah, can't get them except for on the mainland. I grew up having them and it sucks we can't get them here.
Can't get herring either...tried making them with whiting but its no good, probably need to use an oily fish like mullet. Going to the mainland in a few weeks and I'll indulge
DC