Copy a package from registry to another project or group

Hi I work with a lot of clients, I have some repositories which have generic, npm, composer registries, the problem is that the clients will be able to update and get my updates forever, however that’s not fair on my end.

Is there any way that I could copy a particular package version from registry of a project or group to another one?

To clarify I would ask them to create a project and then I would just copy one specific version from my original package registry to their own empty project’s package registry, that way they won’t be able to update forever.