Outer Halfshaft seal size near side?

[marknj]

Hi,
Truck is in garage having rear bearings and seals replaced. Only problem is the near side outer seal is a different size to the off side! Slightly larger?
Has anyone come accross this before or have any idea where i could get a rep seal from? The only number i could see is BG6035E.
I have asked Milner - they have never had any probs before Mr Toyota has no idea either.
The other option seems to be getting a s/h halfshaft and hub!£?

Many thanks,
Mark

[marknj]

Modified Halfshaft

After lots of messing around have discovered that there is a modified halfshaft!
This uses a different outer seal AND bearing.