Prebis and bis for prot pala in TOC phase

Hey all,

Just made my first wrath character, a prot pala, and hit 80. I really haven't been able to find relevant bis/prebis lists for this phase (Just this one, https://legacy-wow.com/wotlk-prot-paladin-pre-raid-bis/ , that I believe is for naxx patch), but I've heard that wotlk gearing is very linear. Can I get most of my prebis from just doing heroics? Do they drop from bosses, or I've heard that I can buy 25 man TOC tier from just doing heroics? Really, any help at all is hugely appreciated! Just trying to figure out catch-up mechanics and what my gearing route should be.

Thanks much.