Yes. You can become a LIR and got yourself assigned an IPv6 block. As a LIR you have the right to create an Autonomous System which almost does what you want if

Yes. You can become a LIR and got yourself assigned an IPv6 block. As a LIR you have the right to create an Autonomous System which almost does what you want if you run BGP. You can still do manual peering though, and learning BGP is whole another level of pain and patient. I'm on my way to becoming such operator to fiddle around Calico with IPv6