Hi,
I'm currently outside the US as well but will be going back to visit mid July. What I did was I called and emailed several SAs (CHANEL boutique,
Nordstrom, Neiman Marcus, Saks, Hirshleifers). One of the SAs found me the bag I want. I gave her my credit card (I didn't even use my US cc because my other CC from the country I'm currently in has better rewards). The SA was able to charge hold the bad for me. She said I can go pick it up when I get there or she can ship it to my house. However, it will be less than a month from when the CC was charged. I'm not sure whether it will be different in your case since you won't be there until several months. You can ask the SA if she/he can keep it for you until you get there.