When you look at the stats, the last B&M purchased by Paramount was in '99. Cedar Fair has been buying B&M's lately. Dorney got Talon in '01 and now Hydra in '05. Knott's got Silver Bullet in '04, and now Worlds Of Fun is getting Patriot in '06.
Needless to say, Six Flags buys a B&M about every year.
Its just a matter of time and space till Kings Island gets a B&M. Sadly to say, with Vortex leaving the park in five or so years, they are going to replace it with another big steel ride. Who knows, the park may even expland somewhere and put another steel there.
I dont think B&M would tell their fabricator that they have agreements like that, its more company buisiness then anything.