Where can I Buy Kaima or Jeerakasala Rice?
You need to use Kali Jeera rice available in most Patel stores or big indian stores. We were also looking for this and avoiding Kali Jeera thinking it is some black rice whereas it is not. This is rice used in Nor Malabar chicken biriyanis. 

And no need to mention that ghee rice or biriyani prepared with Kali Jeera rice tastes way better than normal Basmati rice.