Yeah, I think that's what I'll have to do. I haven't had a chance to run down there.
Be careful with your measurements. I had decided to order online and did some measurements at home, which put me at a 40-41 according to Vibrams website (I had about 10.25-10.5in foot length). I tried on a 40 at REI which ended up being way to small, so the footwear guy had me try on a 42 which ended up fitting perfectly. My big toe and heel fit snugly. Anything smaller and it would have been crushing my feet. The KMD sports with the green on them are $55 at REI right now, so I just ended up buying them there instead.
Good luck with your purchase.
EDIT: For what its worth, I'm a size 9 as well. On the foot scales my foot stops right at the 9 mark.