It is indeed on the marketplace, though I don't remember exactly where. I think it was either in the Force Unleashed or Clone Wars lines of clothing. Keep looking for Star Wars + Avatar Clothes for long enough and you should find it.
If they ever release the white Grand Admiral's uniform, I think the nerd-joy would kill me =)
Ah yes. Never actually been there, but for some reason people are always going to/mentioning Hutchinson. "Going to Hutch", "Found a place in Hutchinson", "A buddy of mine...in Hutchinson". Gives me the impression that it is happening there :P
Hey, is your avatar outfit on the Marketplace? I would be a hero if I showed my husband where to buy it, as he just mentioned wanting an imperial officer outfit (his tag is Grand Moff T)