There are a few maternity stores, but most are really expensive!!! H and M in Central has some good basics and reasonable, but 9 months on Wellington and Linea Negra on Queen's road are quite expensive. Depends on your budget. They both have nice clothes though.
I did vaginal in my first and it wasn't painless, but like Mariac mentions, c-sections aren't meant to be natural, they're for necessity. There are even worse stories that come with c-sections. Media today hasn't helped put an emphasis on the the beauty of natural birth and focused on the negative. It's not like they do it on tv. Avoid Discovery Home and Health baby stories before your baby is born. Please watch the Business of Being Born. Surround yourself with positive birth stories and ignore those that want to tell you the negative stories. I was sooooo happy that my baby could come out naturally and the pushing part actually didn't hurt. Our bodies are meant to do this and it's sooo beautiful when it happens. You can try Hypnobirthing at Annerley or Kathy Kitzis does Calmbirthing classes. I know so many people that did it drug free. I asked for an epidural after 40 hours of back labour but that was because my baby was sunny side up so it was quite painful and the hypnobirthing exercises did help a lot for me in the early labour. Good luck with your decision!
Anna