If you are thinking of fabrication, Piano wire from a model shop will make a good spring, just take care as piano wire is brittle and should be worked hot. probably easier to source one, that spring in the picture looks tricky to make.
@Runoutofgears started
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If you are thinking of fabrication, Piano wire from a model shop will make a good spring, just take care as piano wire is brittle and should be worked hot. probably easier to source one, that spring in the picture looks tricky to make.