Orc in CB only lower Clan Crushbone and Indigo Brotherhood. Indigo Brotherhood are mostly located near the War Guild in Neriak, but a few guards throughout Neriak and very few in other zones other than Crushbone.
I have an Ogre Bst and Trl Shd that can run around Neriak no problem and leveled in CB. They never made KoS to Indigo, but darn close. War guild ni Neriak will have nothing to do with either but don't attack unless provoked. Merchants in Neriak love the Shd since I did a bunch of quests to raise faction with them.
Yther Ore.