I would call them.
We had 61D and E. There was another couple with a bassinet in 61F and G.
I made the entire booking over the phone as we had flexibility with our travel dates and I wanted to ensure availability (and confirmation) of a bassinet.
I would assume that row 76 DE/FG and 88DE/FG are also bassinet positions, but I did not check. Again, call.
A380 seatmap:
http://www.lufthansa.com/mediapool/p...dia_871686.pdf