Apple Pencil 2nd Generation Tip

They are readily available from Apple in the US. Apple won't send them to you in India. If you have a friend in the US, ask them to buy you a set (they come with 4 tips for $19 - https://www.apple.com/shop/product/MLUN2AM/A/apple-pencil-tips-4-pack

Then have them ship them to you.

OR

If you go to Amazon India, you could purchase these: https://www.amazon.in/TiMOVO-Pencil-4-Pack-Replacement-iPencil/dp/B07CYSR4TJ/ref=sr_1_6?ie=UTF8&qid=1547913371&sr=8-6&keywords=apple+pencil+tips

As an FYI for anyone who is looking for replacement tips for Apple Pencil 2.

They are indeed the very same tips as Original Apple Pencil and cost (in the US) $19 for a package containing 4 tips. Even though I don't need any, should the need arise, I bought a pack directly at my local Apple Store and they confirmed they are the same tips.

They do have replacement tips available for original pencil, but they don't appear on Apple.com for Apple Pencil 2, so you'll need to contact Apple directly to see if they can be replaced or not.

You're most welcome!

I am from New Delhi India and neither Apple nor their reseller here seem to know anything about availability of spare Apple Pencil (1st generation) tips. Where can I buy these from?

You're welcome. There's usually never anything quite as good as original Apple parts!