Kayaking near Puerta Plata

[FloridaHockeyGuy]

On the Celebrity Silhouette Nov. 21 and 3 of us had hoped to do the Kayaking excursion when in Puerta Plata. Unfortunately, we were slow to book, and it says there is only ONE spot left. Some people have told me that Celebrity may hold back some spots for after embarkation, but not sure if that is true. Does anything know any private tour companies that do this excursion? I have checked some such as Marysol and RV Tours, but neither seems to have that. Any input is greatly appreciated. Thanks.