These are a few "non-intended fly materials" that I use, although I don't think that I can claim that I discovered them.
- Foam ear plugs for a popper body.
- Used leather golf gloves for leeches, stonefly bodies, wingcases, etc.
- False eyelashes for dry fly tails.
- Medical rubber gloves for "latex" strips.
- Peacock herl from a feather store that supplies feathers for dance costumes.
- Bungie cord core rubber for legs on bass bugs.
- Tea bags for dry fly winging material.