Data Security for Suppliers

Hi,

We have a requirement to enable data security for specific suppliers. We have some plants whose supplier information is very sensitive. We want to be able to mask them such that only these suppliers be visible only from a specific responsibility. We have defined our plants as Inventory orgs. However supplier sites can be restricted only by the OU and not by IO. I came across this thread that talks something related and similar to our requirement, however doesn't have a solution. Can folks in the group review and share their experiences for this kind of requirements. All suggestions are