http://www.dancetutor.com/closecont.htm
This was written by a tango instructor in my area who specializes in close embrace. Lots of good dancers rave about him. I've not had the chance to take any classes with him yet, so I can't say for sure, but you might want to check it out.
It is a pay site beyond the sample, but you're willing to buy a DVD so I assumed that wasn't really an issue. (It isn't much to subscribe)