V8 front crank seal

This is odd, I can't seem to find a front crank seal for the 4.0 V8 in my disco, I have the bits to rebuild the pump with but I can find the seal for the old V8 but not the updated THOR version, is it the same, if not where can I find one, it does not seem to be listed on the usual suspects sites?

Try ERR6490

Seems to be quite a common seal.

Peter