I'm not a specialist since I think I was a very lucky newbee...
I went at FSH in December (at that time, I wasn't 100% of style , leather etc...), a SA told me the Order taking was closed, and to try again on Jan or Feb.
I came back in Feb, and another lovely SA (I've never met before) allowed me to place my order.
So theoretically if they don't have what you are looking for at FSH, you can place a SO if they are willing to take it?