67mm Canon (UltraSonic) Snap on Lens Cap

It beats the heck out of the one that ships with the camera except for one tiny detail...there is no way to thread the lens cap CORD to attach it to the camera.  I'm guessing I'll lose the stupid thing within 48 hours :o  Has anyone come up with a solution? Or, know of an outside "pinch" lens cover that has a place to thread the cord?  Nice looking lens cap tho!  Good quality, nice texture.  Can't understand why they'd not make it "attach-able"

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Monica/Canon S3