DALLAS–7-Eleven has narrowed to three finalists in the review for its $25-30 million account, sources said this week. Advancing contenders include GSD&M, Austin, Texas; Deutsch, and Wieden + Kennedy, both New York. Fallon, Minneapolis, did not advance. Dana Manley, a representative of the Dallas-based convenience store chain, declined comment. Sources said a final pitch will be made in January.