A guy in New Zealand? Do you have any idea of what that would cost from usa and back?
Yep, using USPS First-Class Package International Service, about US$25 each way. Pricing available on the website, which offers discounts too. I regularly process many such repairs from dozens of different countries. Professional level repairs to what can be regarded as specialised hardware to component level is rarely going to come for nothing.
In addition I have various unique self developed hardware and software tools for diagnosing complex low-level hardware issues, so can trace and repair a lot of faults that others cannot.
Dan is correct that I'm only accepting Amiga hardware repairs and parts orders for another 2-3 weeks, after which I'm back home to Antarctica for another 13-14 months. Repair service and parts supply resuming in November 2015. Technical support via Email will continue as normal.
But obviously test your existing hardware first. If it boots and operates fine and only needs capacitors replaced, then the capacitors can simply be replaced by anyone with reasonable soldering skills. Not a lot of point sending it to me just for that unless you wanted to pay for the international freight.
Contact me for an estimate if required:
http://amiga.serveftp.net