I don't know of any other time a US president has publicly acknowledged addressing international child abduction with any country.
It is a very impressive, and surprising, achievement. So much effort is put into sweeping this issue under the rug by our "child advocate" diplomats at State who don't want "child custody" issues interfering with what they see as "real" issues, I would not have expected such a high level acknowledgement of the problem.
The only thing that comes close to it, that I can think of, was Meredith Vieira of Dateline asking Obama about the Goldman case, which is rather different than speaking to the issue in general (something Dateline never did, preferring to let viewers think that Sean's abduction was a rare occurrence rather than something that happens every day.)