You can convey the message about the reinspection cost to the supplier in a polite and professional manner. Here's a suggestion:
"Dear [Supplier's Name],
I hope this message finds you well. We appreciate your efforts in addressing the quality concerns raised during the initial inspection. In order to ensure the thoroughness and accuracy of the reinspection process, there will be associated costs that we kindly request your support with.
Please let us know if you require any clarification regarding the reinspection costs or if you have any concerns. We value our partnership and are committed to working together for a successful resolution.
Thank you for your understanding and cooperation.
Best regards,
[Your Name]
[Your Position]
[Your Company]"