Lisa appears in the Double McGuffin, a 1979 movie. It was filmed in January 1978 when Lisa was 14 years old and before she became just another blonde with dark routes. Ironically, Lisa played a student a boarding school (coed).
https://www.youtube.com/watch?v=y33FUwxBJ6c&feature=share&fbclid=IwAR3hg6t0BMQdlLN0-dg-XK9vjqPV7g0Mk-sFx-V68RUia3C43ofg3gRYTlA