Your message was posted many years ago so you may now have all the info you want. However, If you are still interested I have info on many Benningtons mainly originating in Norfolk & spreading over the UK, USA, Canada, New Zealand, Australia et al.
My branch of the family goes back to Thomas Bennington, born abt. 1645 possibly in Great Fransham, Norfolk.
Will be happy to provide details if you can confirm your e.mail address.