Being complete rookie on krises, I think that answer is easy. It is because there are ralative legends and magic around krises made with meteoric iron, and I didn't hear any of them about Indian weapons. When you mix up legends and magic with attractive weapon = very popular story and weapon
- it's just a thought from European view, lets wait what forum "krises sindicate" (still growing stronger I think) will tell us about it
PS. And by the way: it's just a second hand information, but what I heard there fall the meteor in 18th century on Java, so that's why meteoric iron was popular for some time. And it was often replaced with nickel, wasn't it ?