Erm, maybe I was tripping when I wrote that the other day. I'm sure I saw copies of it in the usual places (eg Snell) last year or at least I have a memory of being surprised at seeing it still for sale last year (which does not bode well). So, as I cannot actually place where I saw it, it may be that I am getting confused and that I didn't actually see it last year but have a kind of false memory of seeing it that has formed through seeing it so many times in previous trips to Chamonix over the past fifteen years that I expected to see it last year and my mind simply constructed its own version of seeing it in the shops last year from memories of seeing it for sale previously.
On the other hand, I may have seen in last year and have simply forgotten where.
I hope you find a copy because it really is awesome as you say. The topos generally pretty good (with a few exception that have caused me much worry as I've gone way off route onto shitty rock, once because the topo missed a whole pitch out) and I like Piola's style in the guide. I usually photocopy the topo pages that I will need and laminate them to take on the route in a handy pocket sized micro style.