The bottom of the 3 links has the original recall info
Read the different stages of repair,if the end float is too great you replace the driveshaft itself.
Below that,you fit relevant shims and cage
If No real play,just fit cage.(they all had cage fitted regardless)
Part numbers are listed,just google or eBay etc search the part numbers
There are even some new old stock shims listed on eBay
https://ebay.io/m/IdrGd1https://ebay.io/m/bZLKeWhttps://ebay.io/m/3svIlVAnd the quoted price to do bearings,
As you’ve said,they have NO effect on any endfloat you have at the rear hubs,so unless they are noisy.theres no real need or benefit from replacing them