Our registrar for ISO 9001 is giving us a finding for not having a vendor on our ASL. We have a customer that requires us to use a vendor, McMaster, that will not complete a supplier survey. As they have not completed the survey after continual pestering (for years) we removed them from the ASL. While we understand that we must control our vendors, our customer will not allow purchase from elsewhere as it would require drawing revisions (the customer is a medical device company). Any suggestions on how to ?control? McMaster, or any verbiage to keep them off our ASL but still show they are a vendor?