If the gear lever boot is kaput, that's where the water will have got in. Seals and bearings I get from a national company called Eriks. Maybe a depot near you. Have you drained the oil from the gearbox? Anything in it beside water? The movement on the axle will be a worn needle roller. That's in the axle itself. You could gently pull the hubs off with a puller of some kind. DO NOT hit them with a hammer. They are cast steel and will break.
