Hi @DebSerge, welcome to Cruise Critic! If you go to the top of this page, look for the "find your roll call" tab, follow that through to HAL roll calls, then Westerdam roll calls, you will find a very active thread relating to your cruise. That would be the place to ask and you may find people organising private tours through there as well.
Enjoy your cruise, it looks amazing!
Cheers, Anne