would you know of any repair shops in NZ or anyone who does custom sewing in regards to surt kites. The reason I ask is that the material used is very similar if not identical to Silicone Impregnated Nylon and Spinnaker cloth which is widely used in tarp shelters these days. I need to find someone who is competent on sewing these materials, which is rare, for some alterations I have in mind. Any help would be appreciated.