Did you lose or break the original Orange Mount Frame? The Frame is used as a guide to install the AMD CPU. If you really need a new one I would suggest you contact AMD Support through email here : Email Form and see if they can send you a new one or guide you on how to replace it with a new one.
I imagine this Mount Frame comes included only with the entire CPU purchase and is an item not sold separately. I couldn't find anywhere that sells it as a separate item. Thus you need to go to AMD Support and see if they can send you one since they are the ones that manufacturers and packages the Thread Ripper CPU for public sale.