Okay, time to come out clean; I've been building Country of Origin : India browser extension ever since you published this need gap and also that I've seen several others expressing their need for such a solution including me!
With Country of Origin : India browser extension, Country of Origin : India label is displayed prominently over the product tile on the ecommerce sites, so we need not check every product individually and search for this manually in the product description.
It's now publicly available and it's FREE for everyone, check it out.