Parrots and cages/food/rescues in Norway?

Hello! A friend of mine is moving from the US to Norway for her partners work, and is bringing with her three parrots – a cockatoo, and two cockatiels. She’s got the paperwork pretty much figured out, but has run into a snag regarding bird supplies, and wants to make sure it’s as smooth a transition as is possible for everyone.

It looks like cages from Montana Cages are the best bet, is that correct?

For food, perches, toys, etc – Is it typical to order from a UK company and have it shipped? If you have birds, what’s your preferred method/shops? What food do you feed your parrots?

Are rescues easy to find, should she decide she wants to adopt another while there?

This one is really just for my own curiosity – I’ve been told in a few European countries, there’s a regulation (law?) that all parrot species must be kept in pairs. Is this true for Norway?

Thank you in advance for any help!

(I’ve included a tax of my own cockatoo, because I love showing her off)