How to find agents and market a new tourism business?

Hi All, We are a new tourism firm in Sri Lanka. Sri Lanka has been rated No. 1 by the "Newyork Times" in their "Best Places to Go" list. Also, rated No. 2 by the "National Geographic Channel" in their "World's Best Islands to Visit". Sri Lanka offers something for everyone from sandy beaches to ancient & culture; from adventurous wild life to eye-catching green hill country & water falls; from numerous water sports to hiking, trekking and many more sports; and from whale watching to aboriginal people. "Blue Whale" could also be seen here. Considering this all, we have started a new tour firm which offers services to tourists by arranging itineraries, guides, drivers, luxury vehicles as well as star hotel accommodation and a verity of Western, Arabic, Chinese or local food. We have very good relationships with local hotels. We have successfully did a couple of tours with some tourists from the USA, the UK as well as from Germany. Now we would like to expand our market. Please could you provide some suggestions as to how we can expand the services ? How we can find marketing agents ? We have a website. However, we are still not sure how many of the executives who would like to go on a holiday may use internet to search for different kinds of tour operators and compare their services. Because I think our target audience may be a bit busy people (a person without a job may not afford a holiday logically) and thus such people may not use internet much to search for tour operators I think. Please suggest me. Thanks a lot in advance.