I think running a Utopia country and placing all second teams there would be the only option.
Absolutely!
It would give the feel of a B3 where good managers from around the world compete against each other.
I really like this. It would also create a new economic state. Perhaps it could be added that there are no Free Agents, too?
No matter how it happens though, I am willing to pay for a second team.
Nope. I would seriously consider quitting if there were loads of other country's managers coming to play in Oz, not for lack of competition, but because cheating would just become waaaay too easy.
I will definitely continue paying supporter (and encourage others) to have a second team in a highly competitive league!