In rough order of speed-to-a-verified-contact:
- Customs shipment data — the companies actually importing your product, with contacts. Fastest and most targeted.
- B2B directories — list your business (free tiers are enough to start) and browse buyers in your target countries.
- Trade fairs — export promotion councils and trade bodies run them; a stall or even a visit with a brochure produces real inquiries.
- Indian embassy commercial departments — email their trade desk with a plain-text company introduction and your product ask.
- Export promotion council and chamber membership — they collect buyer inquiries at fairs and pass them to members.
The bottleneck is rarely data access — it is outreach discipline. Cold email plus cold calling, with follow-up, beats any single channel.