Easy Search for Renamed Units
As of '8-25-17', coinciding with Games Workshop's "General's Handbook 2017," Warhammer Community has released updated FAQs for the Grand Alliances, as well as updated the legacy Compendiums for the old armies (Bretonnia, Beastmen, Tomb Kings, etc). In these Compendiums, at the very end, there are list of units with Substitute Warscrolls, as was stated by user 'aslum' on '7-31-17' that now includes not just Named and out-of-production models, but also models that have had their unit's name changed for the Age of Sigmar lore (Empire Greatsword -> Freeguild Greatsword for example) and updated Pitched Battle profiles for legacy units. Here is a direct link to them.