For one source of data, you can get electronic versions of the yellow pages and similar directories covering your target markets, and then upload any select zip codes and industries that you want to work in.
You can then see what information is available on the Internet about each company, and you can purchase filtered lists, cleaned of extraneous data, to merge in with all your original data. The web social network LinkedIn is a fantastic source for potential sales prospects and related information. Also keep an eye out for Lure.com.
