My snakes still hunt their frozen prey too.
The "predatory stimulation" theory is something that doesn't need to be experienced. Snakes smell food, they go into feeding mode and they eat. They don't care weather or not the prey is alive at the start of it.
If you dont want mice in your regular freezer there are a few options:
1. invest in a minifreezer or mini fridge. All you need is a 1x1x1 freezer, they make them for college kids.
2. feed live. Snakes have been eating live prey for thousands of years.
3. feed F/T, but pick up your feeders the day you're going to feed.
There are variants, but those are the three basic things I can come up with. Personally? I've got a chest feezer, best 180.00 i ever spent.