I don't know how many were made, however, at the Westcoaster Rick said they were going to be re-releasing the bridge w/ some improvements. The feeling I had was that the improvements were mostly to revolve around the packaging of the bridge, but it may not be limited to that. Sorry for the sketchy details, but it was one of those things I was surprised to hear, as I thought the bridge had come and gone, but Rick did mention at the Westcoaster that it would be reemerging sometime in the future, but he did not indicate when.
Joe