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mate i'm with mackmauler on this one but you could try putting them in very warm salty water bout 1 litre with a few teaspoons of metho or kerro leavem for a bit then dry em and put in the freezer.
I used to preserve my left over ones in metho and a fews drops of aniseed oil. Dunno if it was any better or not, but they smelt nice when I took them out.