Yacht Fittings: 
Radio Yacht Supplies: http://www.radioyachtsuppliesnz.co.nz/#RIGGING

Radio Transmitters - New or Repair:
RC Hobbies: 
https://www.rchobbies.co.nz/electronics/radio-gear/transmitters/

Yacht Design and Sails:
http://www.bgsailsanddesign.com/

https://www.vickersrcsailing.com/

For Sails, Boats, and All Radio Control Boat Parts etc:
sailboatrc.com. 

Boat Graphics:
http://signaddiction.co.nz/