I do recall someone saying that BD had shower at T1 international in the business class lounge, but I wouldn't count on it -- and you can't get in anyway since you're going to T1 domestic. Besides, the AC showers are very nice and the F&P soap is always very refreshing.
gigi -- Remember to insist that AC print you the BD BP at check-in or at the MLL. It can be done -- same or separate ticket.