North American Arms has the 4" plus barrel sidewinder made. From what I here it is just a matter of them jigging up the machines for a few runs to make them. They had a model at shot show to show the world but have not started products yet. I'm not sure what is holding them up as the huge gun buying rush in the U.S. has slowed down a lot and the back logs are almost gone. I too ended up buying a 1860 Earl. When the Sidewinder finnally comes in I'll get one too! Only thing now is our dollar has dropped so the great prices we have enjoyed the past few years are gone so expect a bigger price tag to it. Maybe Wanstalls have more up to date information.