I think you can get the EKA number from a LR Dealer.A very good idea to have it in your wallet or log it in your phone, as it may save you from alot of expense and stress as i found out on Friday.
Key fob packed up, no way to start LR, AA man called couldn't do anything ( reassuring that the alarm and immobiliser works on my 10 year old Discovery!), £100 upgrade on my AA membership to get me home.Fortunatley found EKA number in paperwork, now stored in my memory.
And managed to get a new fob on Saturday morning from Barrets of Ashford(LR Dealer), who were fantastic! And not as expensive as i was expecting, £67+Vat.Even got fed and watered at the dealership, as it was the launch of the Freelander 2.