Ahhhh i get it now.... bit awkward but go with the Sa that helps you the most without hurting the other !!
You know, the whole problem is that I can't wait and let them do their job. KWIM? In SF it takes them so long to ever get to anything (if they ever do) that I wind up doing it myself and then I get into all sorts of trouble..............
Are you going in to pick up the scarf or having it sent direct? If you are going into the store, try and go when the new one is there so she can give it to you personally. Try to stretch out the visit by having her show you stuff. Discuss ordering a bag from her even if you are not really going to do it. I think she will get the message that she is taking over for you. I had this problem in a clothing store years ago and managed the changeover. When the manager said "I will get ABC for you," I said " you know I would rather work with XYZ today." They got the message real quick. They want your business. You are the driver they are the passengers. If pushed, you could say that you prefer working with a person who shares more of your taste etc. Whaddya think?