Does anyone know the manufacturer of the two fans (and model numbers) on the L3+s?  I've been to Bitmain's support site and tried to order replacement fans  but they are not on the pick list.  

UPDATE:  Bitmain is not stocking the fan as a spare part so if there is a fan failure you'll have to go through warranty repair.  Looks like you won't have to return the unit and they will ship out a new fan.  Would still be best if we know the fan manufacturer as we know it could easily take a week to get a spare part and lose 5-14x that much in mining revenue while waiting.