You could probably make that work, but the problem you'll run into with any of these options is chain length. The difference between a 13T and a 22T in back with that 35T up front will be 2" of chain. If you can slam your wheel all the way forward with the 22T, and have more than an inch of space to slide it back for the 13T, it'll work.

I don't know when we're getting more of the AC 15T freewheels in, but I'll post it to the blog if they show up.