You can host your own with harbor, and set up replication per repo (pull upstream tags) If you need a commercial product/support you can use MSR v4.

Harbor can install on any K8s cluster using helm, with just a couple of dependencies (cert-manager, postgres op, redis-op) Replication stuff you can easily add.

I have some no-warranty terraform I could share if there is some interest.

You can also host your own with harbor (or MSR v4 if you want a commercial product.) You can set them up to replicate upstream.

You had my attention, now you have my interest

Outside of NA there are.