I have myself kind of stuck between a rock and a hard spot. I have a 1986 300Z in the shop for some service work that includes removing the upper intake plenum. The flex hose that connects the intake duct to the elbow leading to the throttle body is split in two places. This would be the ribbed rubber hose in the ducting. My local dealer says it's no longer available. Does anyone know where I can get a replacement or a suitable substitute? The Nissan P/N is 16578-01P10. Many thanks in advance.