As far as I can tell, 100 and 200 series use similar rear shock mounts. For example , the Ironman 4x4 part number for rear shocks is the same for both 100 and 200 series.
Fox told me that the 2.0 shocks for the rear of the 200 series are a firmer valve spec and may be better suited for a heavier 100 series. Part # 985-24-124
Also, it seems that the rear shocks on the 100 and 200 series LC may be interchangeable. If so, might be able to use the rear Fox 2.5 Reservoir shock for the 200 Series.
Just FYI, those extended length part numbers are for the 105 Land Cruiser. Obviously the fronts will not work on the 100 IFS, but maybe the extended rears will work...