Try the Coffee Bean Beetle.
Sort through some coffee beans for the right size and a good shape. Wrap some thread on the hook and then super glue the bean onto it. A coat of Hardasnails makes a perfect beetle. A spot of bright paint can be added to the top before you coat it for visibility.
This works as well on wild trout as hatchery fish. Always have few with me.

Regular or decafe...........doesn't seem to matter!!