Malaysia has narrowed its search for a replacement anti-ship missile system to four potential suppliers after Norway revoked an export licence for a deal that Kuala Lumpur said was already more than 90 per cent paid for.The cancellation came after Oslo tightened arms-export rules in a shift that analysts say reveals how access to advanced arms can depend as much on supplier-country politics as on signed contracts.Turkey, South Korea and two unspecified European nations were being assessed as...