It's in there. Here's the first few recruitment lines for it. Just open the file, open the find function, and paste recruit "hellenistic cavalry hippeis baktrioi" 0 requires into the field. Then keep deleteing them till you can't find any more. Also Bactria used the old Brutii slot, iirc Eurpis uses the old Thrace spot.

recruit "hellenistic cavalry hippeis baktrioi" 0 requires factions { romans_brutii, } and hidden_resource EA and hidden_resource D and hidden_resource y1 and hidden_resource y2 and hidden_resource y4 and hidden_resource n8
recruit "hellenistic cavalry hippeis baktrioi" 0 requires factions { romans_brutii, } and hidden_resource EA and hidden_resource D and hidden_resource n1 and hidden_resource n2 and hidden_resource n4 and hidden_resource y8
recruit "hellenistic cavalry hippeis baktrioi" 0 requires factions { romans_brutii, } and hidden_resource EA and hidden_resource B and hidden_resource y1 and hidden_resource n2 and hidden_resource y4 and hidden_resource n8