formula I remember seeing advertisements for theese places on my last trip to Florida they might not have what you want but its worth a shot.
Dons Salvage, Clearwater FL 727-576-8577
also try outlaw surplus www.outlawsurplus.com (I think)
I dont know much about either place but I remember seeing a set of K-Planes when I visited Dons Salvage, and I saw an ad in Boat Trader for used K-Planes @ outlaw surplus
Hope this helps