You're aware that people don't sail this time of year because the sailing sucks, right? It's not for lack of business; it's for excess of bad weather.
I always suggest people ask Stuart from Mamallena Hostel. If he doesn't know anyone sailing, I'd probably fly--there may be a few dregs still making the run, but there are some miserable times on some of those boats.
Someone reported here a couple of weeks ago about a boat I'd never heard of. You might search for that post if you haven't already.