I couldn't get the ebay link to open, so I can't tell for sure, but I've never seen small hose clamps that were as good as Nissan OEM. The OEM ones are full stainless and everything I've ever run into aftermarket was at least partially plain steel.
If the ones on ebay aren't 100% stainless then just go to a junkyard and grab a handful off Sentras and Maximas.
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