I am looking to make a bulk purchase of organic black seed oil for a health and wellness initiative. The ideal supplier should offer high-quality, certified organic black seed oil with competitive pricing. I am interested in quantities starting from 500 litres, and the product must be packaged in light-resistant containers to ensure freshness. Additionally, suppliers should be able to provide certificates of authenticity and proof of sourcing. Please note, delivery should be within Ireland, and I would prefer suppliers who can offer flexible payment terms and reliable shipping options.