i also have had luck w/ bakers semi-sweet chocolate chunks (not their chips), & there's some kosher/parve brand that kroger sells, too (that if we hadn't devoured i could give you the name of!)
Marla Shapiro, Ph.D.
MSC 5A0622
Regents Center for Learning Disorders
Georgia State University
33 Gilmer Street SE, Unit 5
Atlanta, GA 30303-3085