Didn't quite quite get your question! Can you elaborate?
Amazon doesn't serve this market. Can you believe, we can't buy a pulley online in India?
India needs MacMaster Car and HomeDepot/Lowes equivalent. Amazon is unlikely to serve this niche.
It's actually billion dollar market and no one is entering this space for now.
How can Indian entrepreneur/makers create prototypes if they can't source the correct parts they needs?
In big cities, there are some niche shops from where you can source the parts but they are not available everywhere.