Why not just support your LBS and be done with the whole axle situation. You can waste time and energy on this to save a couple of dollars, and that's even if you end up getting the right set-up. You'll still end up paying shipping on top of the purchase price. You can have your axle today, or you can save $10 dollars and because you don't know what you're looking for, maybe have the right part 2 weeks from now.

Knowledge, peace of mind, service. That's the value that an LBS gives you. I'd pay a little extra for that. Hell, if people just keep taking shots in the dark with FleaBay, then soon the LBS won't be there when you need it.