Work for USN for 34 years in logistics, so I know about shelf life (cradle to grave 30+ years). Guy buys a brand new raptor and needs a belt a few years afterwards is what I'm thinking
That said, my comment would still be the same, but he was just looking for a spare, not a replacement. Maybe mhavanti might have the answer, don't know have to give it some time to see if the failure rate has increased for the given model