You can check out the Royal Rangers (www.royalrangers.com). They are affiliated primarily with the Assemblies of God, but there are outposts established at other churches as well. Boys don't have be church members to join, but they have a distinctly Christian focus.
Thanks. There are also Pathfinders (the ones I know are also affiliated with a church, but maybe not all are?) and some of the Boys Clubs maintain reasonably decent standards, indeed perhaps most of them do...so far, anyway. Worth looking around!