I have been searching high and low, trying to find some that aren't fragrance oils floating in a pool of mineral oil. Gross. What a toxic mess most of them are!
Anyhoo, unless essential oils of clary sage, lavender, orange, ginger, rose, geranium, cedar, mint, cinnamon and last-but-not-least cypress, will poison you if you smell them, I have some loverly new reed diffusers from SunLeaf Naturals in stock.
And, they're local!
Each diffuser last between 6-9 months.