As far as I know, the CL Madison boutique is the only place that currently has them, and I'm not sure that there are any sizes left. If they don't have your size and you're willing to size up half size (like I did for my fuschias, since I just had to have them), one of our own TPF'ers is selling hers on ebay:
http://cgi.ebay.com/NIB-Christian-Louboutin-Declic-PURPLE-SUEDE-Size-39_W0QQitemZ280259500868QQcmdZViewItem?hash=item280259500868&_trkparms=39%3A1%7C66%3A2%7C65%3A10%7C240%3A1318&_trksid=p3286.c0.m14