I see you are in Selwyn, @akaroa1 is into making springs I believe (could be wrong here) having the other one to work off as a model would make it easier
Assuming they aren't available on a shop shelf anywhere.
If you or mr h are trying to get a ring off (in the background with the olive oil) have a look into using a length of dental floss or cottton wrapped tightly round the finger multiple times to and then under the ring iirc
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