The cataphract reform hasn't been implemented yet, IIRC. Cataphracts will become available when the vanilla Marian reform is triggered.

I am not sure of the current build, but in EB 0.74 Indian elephants were available in the cities to the east and the south of Baktra, and also in the capital of Epeiros; African forest elephants can be recruited to the west of Carthage and north of the Sahara; and both types of African elephant can be recruited in the three cities south of Egypt.