Ironically, I'm asking not because I want them, but because I want to get rid of them. I downloaded a few sims from TS3's main site, only to realize too late that they were transgender/crossdressers/whatever. I now have a handful of boots, shirts, and more for women on my men, but they show up randomly (I think some may be default replacements). I can't delete them in-game, and I can't seem to find which folders they're in, either. Even if I create a man using all standard clothing (i.e. MALE clothing), half the time, when he gets in the shower, skinny dips, or is otherwise naked, I see a female t-shirt shape, often w/ those boots. What's worse is what it does to toddlers (it's all distorted like some horrible monster=thing).
I have a lot of custom content installed, so I'd rather not disable all of it (that would mess up quite a lot, from hair to clothes to skin). However, if someone can point me in the direction of the origin of these files, I can look them up in my system and DESTROY THEM PERMANENTLY.

Thanks in advance for any and all help!