Hey D Mac, almost 2 years has passed since your reply so I don't know if you found a solution yet or just forgot the post like me...
What I did was to find in my apartment another power supply with the same specs and cut/connect the cables from the lamp.
This worked until today when the power supply decided to die, that's the reason why I remembered about this post.
I hope you found a solution, now I have to buy a new one
Enrico
December 2017