E bay maybe? lol
I remember at my old house, My husband got me a beautiful heart shaped diamond ring, when he worked at a retail store (2nd job). I loved that ring SO much, it was so pretty and unique. I left it in the bathroom after my shower, and it was never seen again. I looked everywhere, including in the air vents, under the oven and fridge! Might wanna try those places first! I never got my ring back, I should have been checking potty pans, but I doubt they could get this ring down, with its odd shape and it was kind of big. But who knows??
Good luck on the search for the missing earring *keeps fingers crossed*