If you're using Tanal-A for haze stability, an alternative is BioCloud from Kerry. The office that handles Asia (and probably India) is in Singapore.
https://www.kerry.com/contact-us/global-locations
Good Luck! It sounds like you might be working in the emerging Craft Beer market in India. Exciting opportunity!
In the US, most malt wholesale companies handle the full range of brewing products. If you ask them, they will probably start carrying products for you. Sometimes, you have to enlist the help of your fellow brewing companies to show demand.