Basically I think you will struggle but good luck.
Is there any possibility he uses the same docking station regularly? Might be worthwhile putting up a note/poster with a (throwaway temporary) email address that you can be contacted on.
Might be worthwhile phoning the Call Centre and asking to speak to a Senior Manager to see if they could contact him and offer him your email address or phone number. Due to the way of the world nowadays I can see them being worried about acting as a middle man, setting a precedent, etc, etc but you never know.
All the best,