Approach other high-end resorts in Europe and ask to buy their buyers list. Why reinvent the wheel? Find out what's attracting your target clientele to the destinations they're going to *now*, and use those reasons to direct them to you.

See if other destinations are interested in reducing costs by joining in on a promotional strategy. Mailing the same customers with two different offers, perhaps in separate countries, is a great way to piggyback onto their proven list, and lower costs for both of you.