ebay is prob ur best bet honestly.
Tom in Titan Autoworks will be able to sort ya out. Japanese based comany delivering anywhere in the world http://www.titanautoworks.com/
Im in Japan so ill look around for someplace that ships stateside for you.
Looking for a Used Skyline in your area?
CarGurus has 6 nationwide Skyline listings and the tools to find you a great deal.
Search Nissan Skyline Questions
Nissan Skyline Experts