Address of Ample Rise is room 507, 28 Queens Road East, Wanchai.
Here are photos of the building which is called the Tesbury Centre:
http://wiki.worldflicks.org/tesbury_centre.html#
Looks high rent, but room 507? Then again I don't suppose you need more than a foot on the ground to do business. Better than a post box, which is probably all it is.