Where to buy bulk HPLC tested Glabridin 40% and 90% powder directly?

As a procurement manager for a mid-sized European skincare manufacturer, we have been facing supply chain instability and batch-to-batch quality variations from our current trading company intermediaries. We are actively looking to bypass middlemen and establish a direct partnership with a primary botanical extract factory. We specifically need a reliable supplier who can provide bulk quantities of HPLC-tested Glabridin in both 40% and 90% powder formats, ensuring consistent active compound concentrations for our upcoming skin-brightening product lines without sudden price hikes or quality drops.