If it's nothing special (and it's probably not if it loosened up on it's own - internet conjecture) just get a Kalloy/Hsin Lung replacement.
Hsin Lung
That's Zoom for anybody not familiar with translating company names into their after-market branding.
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If it's nothing special (and it's probably not if it loosened up on it's own - internet conjecture) just get a Kalloy/Hsin Lung replacement.