Hi Melissa, I just googled quilt shops in NZ and found the following for South Island. http://www.reocities.com/Heartland/Esta ... sland.html
When we visited South Island last spring we visited
Christofer Robyn Quilts
641 Ballantyne Road (airport end 7kms from town)
Wanaka 9382, New Zealand
(03) 443 1810
Open Weekdays 9:30am-5pm; Sat 10am-4pm
It's a small shop out of town in the countryside. As we were on a coach tour we didn't have our own transport so it was the only quilt shop I got to but the ladies were very friendly and helpful. I hope you have a great time.