D3100 docking station power supply replacement

During an office move, I lost a power supply for a D3100 docking station / port replicator. I know that I need a 19.5V 65W power supply, however there is several adapters with those specs listed on the website and the compatibility is also only listed for laptops (not to mention some review saying they followed the compatibility lists provided and still ended up with a wrong adapter).

I would like some help knowing exactly which product I need to get the replace my lost power supply.