IF in NY has some Rick. I can't recall any other places with a big selection. Your size is pretty small so that might make it harder.
Went to IF at lunch today, they did have a couple of ROs, but not much and nothing in my size again. They also had the MMM 5-zip, and a very different one to Barneys. Way thicker leather and less polished I think. Can't be this season. I tried on the 48 since it was the smallest size they had, and the sleeves actually fit nicer than the 46 from Barney's. This makes me think that maybe the older 46 MMM 5-zips will fit me fine. Will have to try and find one to try.