Spray 9-inch square pan with cooking spray. In large bowl, mix cereal, dried fruit, sunflower nuts and peanuts.
In 2-quart saucepan, heat brown sugar, corn syrup and peanut butter to boiling over medium-high heat, stirring constantly. Boil and stir 1 minute. Remove from heat; stir in vanilla.
Pour syrup over snack mix; toss to coat. Press firmly in pan. Cool completely, about 30 minutes. For bars, cut into 6 rows by 4 rows.