You might be able to order the figures from Revell through their parts department.
www.revell.com/.../parts-request-2.php
Ostensibly, its for replacement or damaged parts, but they don't ask for proof of purchase it looks like.
Here's the kit number for the Constitution that I am working on now (85-0398 USS Constitution ).
The figures have no number but are referred to as '20 miniature crew figures' . Worth a shot.
I myself have had virtually no luck finding 1/96 scale figures of sailors for that era. Good luck. Hope this helped.