I have bought Boajuto it at DiPalo's in the past, but I can't be sure if they are currently stocking it. Buon Italia might be a good place to check for it as well. I thought Valrhona was French. It is pretty widely available in any case. Trader Joe's carries it.
Di Palo's Fine Foods
200 Grand St, New York, NY 10013
75 9th Ave, New York, NY 10011