Why not try the Janowski Indian?

If you would like to spice up you repertoire against1.d4, consider the Janowski Indian, a rare but reliable fighting variation of the Old Indian. It is easy to learn as there are only a limited number of plans for White after 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5.

It was introduced by Janowski in the great international tournament at New York 1924 where it caused quite a lot of discussion.

Here are some examples.