For any interested I have finally found an article relating to the planned upgrades of the Portuguese Orions. They are looking to extend service life for 25 years through both airframe work as well as a systems upgrade.
From a quick look at what they want to do with systems, and airframe the project could be said to be an amalgamation of the RNZAF Project Kestral (airframe) and the RAAF AP3 avionics/mission system upgrades.
Cas