Actually, I got a response reasonably quickly, and the response was thorough. It came from the address <[email protected]> and appears to be the concierge desk or a similar desk in the back office. Obviously, the "info" address was a general one, but someone forwarded my e-mail to the right people, which got me where I wanted to go.

However, your suggestion seems to be a good one in general, if you have (or can find) the name of a person.