Request: Quebracho blanco bark

We are currently seeking a long-term cooperation with a supplier of Quebracho Blanco Bark.
The Bark needs to be clean, without any (or very little) wood attached. This is a very urgent, high priority project for us, so any information you could give me would be greatly appreciated. We are currently in need of 1 20foot full container load. This is a business we are hoping to grow to many containers per quarter, which is why we are looking for a partner that can keep us in supply.