Well, leave it to my students. One of them posted a recent version of my Vietnam Mix to the following links. It is a 4-CD version, so not everything listed in my previous post is here, but most of it is. If you want to download it, go for it:
Vietnam Mix CD1
Vietnam Mix CD2
Vietnam Mix CD3
Vietnam Mix CD4
These aren't permanent links ... they might only be available for a couple of days. Also, they might only have a certain amount of downloads on them before they expire, but I thought I'd post 'em nonetheless. Just unzip the files after you download and then import them into whatever audio system you use on your computer.