斯里兰卡采购需求：鱼胶原蛋白肽、牡蛎肽、牛胶原蛋白肽、大豆肽、核桃肽、蚯蚓肽

I'm looking to get a quotation for vegetable-based collagen to be used in our fruit nectar drinks. We're particularly interested in the quality and sourcing of the collagen, as well as any available certifications or specifications you might have. Could you also provide information on the pricing tiers based on different order volumes? Additionally, it would be great to know the lead times for delivery and any samples you could provide for quality assessment. Your prompt response would be appreciated as we aim to finalize our supplier selection soon.