MBTA lost-and-found

So, I lost my room key on Saturday. It happened to be when I was bringing a friend to Logan Airport - so that key could be anywhere at Kenmore station, on a Green Line car, at Government Center, on a Blue Line car, at Airport Station, on a Massport shuttle bus, at Logan, on a Silver Line bus, at South Station, on a Red Line car, at Park Street Station, or on a second Green Line car.

So I, of course, tried to contact lost-and-found. Logan's lost-and-found is run by the state police and is highly efficient. There's an online form to use and you can view a list of items on their website.

The MBTA is not so helpful. The main number given on the website - (617) 222-3200 - just goes to their phone directory with no convenient lost-and-found option. The South Station number goes to an answering machine even during business hours.

What are useful are the individual line numbers. Each colored line maintains its own lost-and-found, and they are manned and have helpful operators. But the numbers are not publicly available! You have to get them from an attendant at a manned station like Park Street, Airport, or Kenmore.

For your convenience, here are the numbers:
Blue: (617) 222-5533
Orange: (617) 222-5403
Green: (617) 222-5220
Red: (617) 222-5321
Silver: (617) 222-2432