Nude citizens?

I’ve been looking for a while to find a nude citizen pack, but to no avail. Can anyone help?
Preferably, can anybody make nude versions of Females 2 (http://half-life.wikia.com/wiki/File:Female02.jpg), 4 (http://half-life.wikia.com/wiki/File:Female04.jpg), and/or 6 (http://half-life.wikia.com/wiki/File:Female06.jpg), and/or Males 7 (http://half-life.wikia.com/wiki/File:Male07.jpg) and 9 (http://half-life.wikia.com/wiki/File:Male09.jpg), please?

Why is it always male 07 and male 09?