You may also look in to March scopes by Denon Optics.
they offer a 5-32 and a whopping 10-60x rifle scopes. Your going to pay though these are up there with Schmidt and Bender and other high end optics. They run $2000+.....
You want more than a 1" tube a 30mm tube gives you more adjustment for elevation and windage. Schmidt and Bender offer I believe a 35mm tube.
Also take a look at IOR Valdada Rifle Scopes. Swarovski also makes a 5-30x scope.
You may want to look hard at reticles offered. a mildot or another form of marked reticle may serve better than a std plex.
If you want the leupold check at Bruno's Shooters Supply.
It is a small shop I believe I have dealt with them before and they are top notch in customer support and they take care of a customer.