Even many big tour companies from other countries don't operate or own their own cruise boats - they either charter boats or they feed into the departure dates that the actual boat owners or operators have set. I remember a representative from Globus Tours asking me for help because some of their groups were getting bumped from ships and so they were looking for a new operator. These companies might just add a couple of hotel nights and airport transfers to a cruise and price it as a package. That is exactly what we could do.
For instance, we have some sample packages that include the Galapagos such as