The APC sneakers I got from the APC website a long time after the sale began. They were all sold out, but then they had some more of the brown sneakers. FYI, a 45cm fits like a 10.5 or 11, not a 12.
I got the boots from Yoox. They were sold out after I snagged them, but later Yoox had a pair in 10.5, which is about a size 12. I got a size 10 (box size 9) and they fit like 11s. Forum member DrBot also has a pair.