RT4WD D16a6 (SOHC ZC) - Transfer case differential seal info

Kia ora civicwagoneers 
I'm in need to replace the Transfer case differential seal on a Honda shuttle Beagle which runs a SOHC ZC (d16a6) 1600cc motor. Gearbox is a 6 speed (1-5 with a extra SL gear), I'm haven't been able to find the specific gearbox code sorry.
I am wondering if anybody knows the size or part number of the Transfer case differential seal, I haven't removed the damaged seal so unable to measure.
Example image:

Cheers,
Dieter

I'm in need to replace the Transfer case differential seal on a Honda shuttle Beagle which runs a SOHC ZC (d16a6) 1600cc motor. Gearbox is a 6 speed (1-5 with a extra SL gear), I'm haven't been able to find the specific gearbox code sorry.
I am wondering if anybody knows the size or part number of the Transfer case differential seal, I haven't removed the damaged seal so unable to measure.
Example image:

Cheers,
Dieter