If metal alloys is a concern then Canada also has a very advanced metallurgical industry; Alcan and Stelco are but a few examples.
As for Italy and Spain, the very reason the Eurofighter has become so expensive is because of quarrelling on workshare, for everything from engines to actual airframes. If production was concentrated only in the UK and Germany then I believe the price would be lower. However, the Italians and Spanish insisted on having full produciton capabilities for all components as well as full technology sharing, engines included. So, even if the engine technology was originally developped in Germany and UK only, the fact of the matter is that Italy and Spain also have full access to ALL technologies involved in ALL components, engines included.