Curaçao is 60k miles (return) in J this month, if you are prepared to travel in May, that's a pretty stellar deal.
Another suggestion: get the cheapest (paid) J fare you can get from any EU country and use your FB miles for the euro segment that will take you to the departure point.
As this forum has taught me, all reward flights require some level of cash on top... if you want to avoid that theres always the option of getting cases of wine instead.