I don't think that kind of movie is often posted on an open internet page (that is, a page you access directly with your browser and without any password or fees). I downloaded a splendid hentai film last week, it's past 20 minutes (almost 60 MB) and looks great, it has very evocative bondage, shemale elements (at one point, the girl in the movie has a dick growing out of her crotch) and nice-loooking, futuristic cityscapes; I got it through an internet hub, with DC++.

It's much too big to share by mail but I could try to post it on rapidshare, so that it would be available for download (names of rapidshare files are commonly encoded, so they won't catch attention). If it works (and then it will be packed with winrar to protect it; you'll need that software to unpack it), I'll post the link here.