Triang/Hornby have released it twice. In the 60's and a slightly upgraded version in 1980. I suppose it should be possible to convert them to DCC.
Here's a link with the photos. http://homepage.ntlworld.com/andrew.walker...ns/rocketoo.htm
Here's a link with the photos. http://homepage.ntlworld.com/andrew.walker...ns/rocketoo.htm