You would need to have some connection to the USA, and the Global Transfers program does not include converting a foreign Centurion to a USA Centurion. You may find
THIS post helpful for context.
Wow OK so am not nearly even contemplating that level of spending so I'll go hide away again lol, though am surprised by the numbers discussed there and their need to run after their points to such a degree especially when premium classes on Avios are like finding hen's teeth