The 448 on the DVD is legit: I sent it to him a few days ago, but neglected to post the links here as well. Here they are:
part 1, part 2, part 3, part 4
The stereo version is already available in lossless, and is linked to here.
Since there is a demand for them, I'll post the six lossless mono files for the 5.1 as soon as I'm able. I'm still looking into how to encode DTS-HD MA, but I'll keep that separate and won't make it the only way to obtain this.
With my upload speed being slow and other duties occupying me, I can't make any promises about when that will be ready. If any of you are holding out on watching the movie until then, I urge you not to wait, as I highly doubt the AC3 will be a disappointment. As I've said before, though lossless audio will always prove superior and should be chosen when available, high bitrate lossy encodes may be quite difficult to distinguish in a blind test if all other factors are the same—and in this case the bitrate truly is the only difference. The simple knowledge of what format one is hearing, I think, influences the judgement on perceived quality, so take this bias out of the equation and I think you'll be surprised at just how good it actually sounds.
Remember that the content is still by far the most important element of what you hear: given the choice between a lossy encode of a good mix, and a lossless copy of a bad one, I know which I'd choose. To cite an extreme example, if I wanted to watch the special edition and all I could pick from was the 1997 version in 384 kbps laserdisc AC3, or the 24-bit lossless mix on the 2011 Bluray . . . do you see where I'm going with this?