Where can I get the English scenarios for Code of Chivalry? They are not on Battleloremaster.com.

Right here. All of the scenarios that came with the base game and the expansions are currently available on FFG's Support Page for BattleLore with the respective releases.

I'm not sure if Universal Head will ever update BattleLoreMasters with the recent (and future?) FFG releases, but here's to hoping