Value Vapor has them and cheap too. If memory serves, 2.99. Not sure what brand they are, though. I believe they only have LR, although they don't list them as such, nor do they mention the ohms. I'm guessing LR based on the fact that they ruined several of my kr808 manuals. Also, lifespan is very inconsistent. Using the same 100% PG
juice, I get anywhere from 2 to 4 weeks out of one. Worth a try for the money.