Just learned about this a few months ago, and haven't been able to locate one. Maybe someone is ready to part with their copy? Willing to pay a little more for a set in better / collectible condition. Thanks! http://www.segagagadomain.com/dreamcast-ntsc_0/dreampara.htm
they pop up once or twice a year on ebay & aren't cheap; keep your eyes open. meanwhile, here's a vid of the thing in action I made years ago (I suck at it, but you get the general idea). I mainly left it there, coz it seems the only vid of it on the web http://www.youtube.com/watch?v=ww3P6vEka9o&list=PLBDAF9BCBD5368CA6&index=5&feature=plpp_video
For some reason those things tend to be a tad more common in Germany. That's where I got mine from. But it took forever to track one down.
I have bought one but the controller cannot be recognised so the game doesn't start and tell me to inset the controller. -.- Can anyone help me with that issue? Edit: It only works with the antenna cable and not with a scart cable.