How to find a business that needs a travel agency?

I work at a travel agency in Pasadena, CA. We've been doing a great job, at getting more business, but we want to expand even more. We already have a big client that gives us almost 75% of our business. We are trying to get another large client. Any ideas on where/how to get another client like this?How to find a business that needs a travel agency?Bench Mark your large client and go for similar clients. That is the best solution