I don't think that any licensing company is stupid enough to license a series that was canceled after three volumes, if they're stupid enough to license a series that was canceled in the first place. Because those series' got canceled for a reason: they didn't sell well. And if they didn't sell well in Japan, the market they were aimed at, a place with a manga market bigger than that of any other country, then they probably won't sell in the significantly smaller American market. In America, a manga's considered a runaway hit if it sells 50,000 copies per volume. In Japan, it's considered mildly popular, at best.
Odds are, Double Arts would sell MAYBE 2,000 copies in America. Maybe. Probably a lot less. A few English speaking fans who liked ths series and buy domestically or import, a few people who see an interesting series and pick it up (though if they know it was canceled after three volumes, they probably wouldn't pick it up), and that's it. For most manga companies, especially in an economic downturn, and in a shrinking market to boot, licensing a series like that is out of the question. Admittedly, I'm talking about only the American market, there are still the French and German markets (two of the three manga markets in the world bigger than America's, the third obviously being Japan), but I doubt that their licensing companies are stuid enough to do it either.
Oh, and I don't think that Tokyopop has ever had a Jump title. Ever. Viz is jointly owned by Shogakukan and Shueisha, so nearly all Weekly Jump manga (I think actually ALL Jump manga) and all Weekly Sunday manga, mayber even all Shueisha and Shogakukan, is licensed by Viz.
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