Hey Maggie!
Have you considered
www.bookabach.co.nz ? It has holiday homes fully furnished, maybe a bit more expensive than an unfurnished rental but since you guys are going in winter, you may be able to negotiate a discount for a long stay until your container arrives?
How the hell are ya anyway? Things are manic with us, trying to pack up the house, fighting with the kids about which toys to throw, which to keep ](*,) but heyho, it's all for the great good!!
Take care and speak soon
Carolynne xx