I have a teddy bear wheat bag and I'd like to refille so it's nice and fresh?

Question:It's a teddy bear what you put in the microwave to heat up for 3 mins and it gives out a lavendar smell, i would like to put new filling in it and was wondering if anyone know where i could get repacement filling

Answers:
Have u tried using lavender oil. oh have u been told to put a microwavable pot with water in with it in the microwave about every 10 times to help keep it revived.