Hi--take a look at www.redweek.com search for resorts by location & type in Maui Ocean Club. You'll find several listings by week, unit size, view category, etc. We've listed our units on there when we have been unable to use them and had good luck. We also use an escrow service to handle the $ side & it's worked out well.
As a Marriott Vacation Club owner, you're entitled to rent at any other Marriott Vacation Club at the owner rate. The rate varies by resort so call Silver Elite reservations 1-800-228-2100 to inquire and book your reservation.