I was grateful that Mr Mehandiratta spared me a few Ambitious 'M' tip nibs in India #8 size that is standard in the bigger Wality pens.
of my Wality pens that have had the nibs swapped only one has an Ambitious nib. The others are Kanwrite, whether branded (K) or OEM.
I have a two Jinhaos with India-made nibs, but that's OT for this thread.
I have some unbranded 35mm nibs that have a pressed tip, not a ball-end. I have not tried to put one in an Indian pen. I would be more likely to buy from Kanpur Writers. I tried Ambitious and I believe the minimum order was 100 pieces.