Idk, think 2nd Gen’s are still all Dana axles.
Do you really need a whole new 3rd member or just looking for an economical unit for a backyard swap vs having it rebuilt which will inevitably end up costing a grand or so?
If the housing or tubes are trashed, you can use a higher geared one in the meantime and have the diff swapped to your 4.10s later as long as you keep it in 2wd.
although depending if you’re towing anything, 2nd gen 5.9s are pretty anemic as is, so higher gears will not be favorable for towing, and definitely noticed.