I hope that you are using the word customer in the old fashioned sense of "someone who pays you for your product or service." If so then ask your current custom

I hope that you are using the word customer in the old fashioned sense of "someone who pays you for your product or service." If so then ask your current customers: For referrals For testimonials What websites, tradeshows, websites, on-line forums they read. Take part in these as they are likely to be target rich environments