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Shouldn't be hard to do homemade wind flags. Maybe use bamboo stakes, some trail flagging tape, bits of a repurposed coat hanger, and some fishing gear snaps.
Made some wind flags that are the plastic garden stakes.
Drilled a small hole in the flat end, bent a paper clip to 90 degrees to which a 2 foot piece of ribbon was attached.
Not the best but better than nothing and allows new shooters to get the idea.
Also have a set of Graham flags set on sheet music stands.
Helps to have the stand as close to vertical as possible.
Even with the wind slack the vanes will turn.
Unfortuneately they have the mind of a politician and sometimes they lie.
Our range has wooden target stands and I staple flagging tape to the bottom of the frame. For intermediate distances I use the small bamboo garden stakes from the $-Store, with wire in the top hollow and the flagging tape. Been doin' that for years.