Sorry for replying late, as I am not actively following PW these days due to my busy schedules.
EPS can be purchased easily from Sher Shah and related places where used items are in abundance. Even any mechanic of yours can order it through their connections.
For Cultus, there are many Japanese cars that have a near to bolt-on fit for this swap.
Whole swap will cost you under 10K with all labors included.
Its a very good tweak to Cultus, and will enhance drive pleasure very much.
Go for it. If you don't have a mechanic, let me know, I will refer you to my own one.