the last time I was at Nordstroms in OakBrook, they only had the Patchwork version of the Dr Q in Mouse Grey. I have NOT seen this bag in stores for quite some time. I bought mine from the MbyMJ boutique here in Chicago when they first opened (late January) and I think I got the last one. Maybe another MbyMJ store might have it -- it's certainly worth calling to find out. All you have to do is call one boutique and they can check all the stores in the company.
The Mouse with silver hardware is from the resort line so it might be a little hard to find anymore --
I agree with iluvmybags, Mouse Grey was a very popular color and I haven't seen it around online for a while now! Your best bet would be trying to call the stores or to lurk around eBay. There was one that was recently sold NWT.