It took a little longer than I would have liked, but I have the core rules and supplements for 4th edition finally compiled in its own online index.
I've created an online searchable reference for all the core rules of 4th edition. This includes the core Rulebook, Battle Bestiary and both the Arcane and Battle Magic supplements. I've also index the FAQs collected from the group that eventually became the Direwolf FAQ Council. Hope you Herohammer lads find it useful. Cheers.
https://4th.whfb.app/