Freelander 1 IRD pinion bearing replacement

I would like to replace the ird rear pinion bearing on my 2001 v6 Freelander – pictured below (ignore the arrow). Can this be done without removing the whole ird and splitting it open? I’m hoping I can disconnect the prop, and remove the rear pinion/cover and change the bearing without too much fuss.

Does anyone know the part number of the ird rear pinion bearing? I’ve seen several complete ird bearing kits on the web but no individual bearings for sale.

The fault I’m looking to fix is the whine it’s had shortly after the auto was replaced. We know it's not the auto, and the main stealer disconnected the ird pinion to allow them to remove the engine/auto/ird as a whole unit. Mondo mode cures the noise, but it’s still detectable with chassis ears. Proportional to the speed of the car, and happens when in neutral (I know this is bad for an auto). So we’re confident it’s the right thing to do.

The pinion housing can be removed without removing the IRD from the vehicle.
I question the point of replacing only the rear bearing since if it is badly worn then the front bearng will also have suffered from the angularity in the shaft and also the debris from the rear rollers passing through it.

Didn't realise there was 2 bearings in the pinion housing part of the ird. I assume they can both be replaced by removing the pinion housing?

Pictures attached (nicked off fleebay) show the pinion housing. Is it possible to split this apart to replace the bearings? Looks like the bolt on the prop shaft end will undo (27mm). I was hoping someone would know the part numbers in advance, but it many be something I have to take apart and look at to get the numbers off the existing bearings. Might be an idea to buy a broken one off ebay to have a practice with.

I assume I need a new oil seel as shown in the photo, and also a new crush washer?