That manga is probably the most available title in all translated mangas, I don't understand why it's so hard to find. That also gives Studio Proteus and Dark Horse mad props for giving mangas a wider audience. As far as I remember Toren Smith of Studio Proteus worked together with Masamune Shirow, a recluse mind you, in bringing Appleseed and his other work over to the US. Yes there were some bad judgement in the earlier releases, such as Adam Warren covers. But the material was basically there. Yeah Tokyo Pop is more faithful to the way it's done in Japan. But let's face it, most of their property is crap. It's more machine driven than SP/DH releases. And I've had no problem enjoying Appleseed, GitS, Gunsmith Cats, Blade Of The Immortal and Oh, My Goddess from Studio Proteus. I think they've done a fine job where hardly anyone else was doing quality english versions. And I've read Viz and other companies during the time I'm talking about. I've met Toren Smith also. He was pretty much as a-hole, but it doesn't take away from the enjoyment that I've had from the books.
As far as now,I don't think you have to worry about Studio Proteus anymore.