Three wheeler mobility walker (Stoke Hammond MK17)

Three wheeler mobility walker with seat and foldable.
In need of a part.. please see photos.
Part has broken and you can’t glue it as it holds the spring. It allows you to change height of handles and secure. You probably could just use a bolt to secure at right height maybe. Seems a shame to put in landfill. But obviously I don’t want anyone to hurt themselves if you can’t secure properly.
Other than that it’s working fine.

       
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