If you loved Stacy: Attack of the Schoolgirl Zombies, try Rape Zombie: Lust of the Dead
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Stacy: Attack of the Schoolgirl Zombies
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Rape Zombie: Lust of the Dead
What they share
Both films are directed by Naoyuki Tomomatsu, and they both carry the 3am cult mood tag, and they sit in Comedy / Horror territory. If that's the register that drew you to Stacy: Attack of the Schoolgirl Zombies, the second film will land in a comparable space — through a different lens.
3am cult
What Rape Zombie: Lust of the Dead is
Tokyo. February. A red paper lantern swings over an empty shrine courtyard. Zombie men cluster outside, groping at the women trapped inside. Momoko, Nozomi, Kanae, and Tamae load rifles with shaky hands. Higher-budget category mistake meets pinku-splatter core.