Auckland metal shop?

[brian and clare]

Hi folks,

I have been rebuilding an aries windvane recently and I need to remove some aluminum parts (leg tubes) from the main casting. Heat and sledgehammer have not budged them, So I am in need of somone who can cut (split lengthwise and pry out) the old tubes out from the casting as they are well corroded in. Does anyone know of a metal shop in auckland that could do this? I just dont have the big tools to do it. I am thinking a sawzall with a long blade might get the job done. Im sure I can wander around down at westhaven area and find somone, but I thought I would see if anyone had a preference. I have to lug the big thing around on a motorbike or cab it so close to the CBD is best.

Thanks,
Brian