Here is their Facebook page, and here is their information if you'd like to donate your hand work. (Don't click on the flier; I can't remember how to put a link to it.)
Here is their TradeMe (NZ eBay) page. For now only residents of New Zealand and Australia can bid, but they are working on an alternative PayPal option.
Donations will go to the Salvation Army and Women's Refuge.
If you'd like to help us spread the word, please feel free to copy the picture above and post, (I have their permission,) but please also attach at least one workable link.
EDIT: After careful consideration, the organizers have decided they will stay with the TradeMe setup only, meaning only those of us in New Zealand and Australia can bid. So, no PayPal option. Sorry about that, but TradeMe is wavering all auction fees for H4C, and doing lots of other things like lost pet search for Christchurch, so please forgive them/me/us.