Alan Scott Wood Fired Oven here in New Zealand - advice?

Hi 

I'm looking for advice from anyone who has constructed an Alan Scott wood fired oven here in New Zealand.  I'm a keen sourdough baker and keen to go to the next level.    I can't seem to find anyone in New Zealand who will construct an oven from scratch.   Instead there seem to be a lot of people selling prefabricated ovens that look like the would be only good for Pizza.  

I'd be grateful for you any advice on offer. 

Thanks