I requested a quote at IndiaMart. I got replies from 6 or 7 vendors. One responded by email, but the rest responded via WhatsApp, the app for free, international text messaging via internet. If I didn't use WhatsApp for other reasons, I would have completely missed most of the quotes.
India Mart was the one. I could try getting WhatsApp when I start using my modern laptop. I did not hear back, maybe I should check spam folder.