A lot of the users here have had good results with
www.mindraven.com which is run by the former UBB.threads owner.
As for moving a forum, I have a guide
here. If you want to just hire someone to do it, I offer such services privately.
You'll need to acquire the license information for the site for ubb.threads or buy a new one (see pricing link on the links bar to the left), and a domain name (unless they're giving you the domain as well).
