I love stumbling upon something that I've already experienced and this is what I've learned on the hunt for a Speedy 30 in Damier Ebene that's MIF. My younger sister wanted her first bag to be MIF so she didn't give up. I went to all three locations in Toronto and the LV in Holt's Yorkdale was the WORST. I asked if they had any MIF and the SA that I spoke to basically asked, "If I find it, are you going to buy it?" I found that really rude because you're being paid to do your job and satisfy a customer. I told him yes but he didn't find one. =(
Next, we were off to the LV in Holt's Bloor St, and it's funny because the SAs there mark which ones are MIF so they knew right away, which was very convenient. But they didn't have any either.
Then I went to the LV boutique on Bloor St and met the NICEST SA that I've ever met at LV who helped us without insisting that we needed to buy anything and wasn't pushing my sister when she was being totally indecisive. They found one but by then, my sister went for the Monogram Speedy Bandouliere which is MIF (typically like all newer bags).
What I've learned is that, if your SA is rude, just leave and go to another LV boutique (preferably on a weekday, it's less busy). Also, all the SAs were telling me that most of the canvas bags will be MIUSA and the leather bags will be MIF - they said that is what LV's leaning towards. But don't give up now if you're looking for one. You just have to keep checking because they get random stock. =)
Good luck!!!