Where's to best place to buy Mobil/Esso LT 71141 ATF?

[Nappler]

Need to change transmission fluid and unfortunatly the car takes this seemingly rare and expensive oil, the specialist was going to use Dextron 3 oil but hasn't done the change yet s I would rather use the original spec stuff as per ZF reccomendations, Land Rover quoted £17.50 a litre plus vat, surely there have got to be cheaper places than that for it, anyone know of a good place that sells Mobils oils over the counter?.

[ivaylo]

I got a 20l. tub from the Oil store for just over £100.