Mine were leaking too, so I ripped them out - got some .8mm mild sheet; cut to oversize with around 30-40 holes and drilled / riveted to the body with non setting sealant.
Going to fibreglass the seems later, sand and paint the whole motor.
They do look a bit crusty don't they🙂 Anyway they are a service part and so listed in the LR Disco 1 parts catalogue. Listed is a M12 nut-tube female NRC9770 and the olive NRC 9771.
If you need the actual tails, you can get them off Ali express (they are an unusual thread, I can't remember the details but I can look it up if you're stuck)