If it's the thicker black cloroplast, it's probably one of mine -- although I don't recall losing one. My plane still has two. Humm... I think we did do some trading with my spare one though. Maybe I didn't get the spare one back in my box after flying.
I'll try to remember to put my meter back in my box Jared. Since the F-18 requires a boatload of support gear (fishing meter to measure bungee pull, hammer, et. al.) I don't usually keep the meter in my box anymore. But I'll try to remember to drop it in for Tuesday.