Apparently the plane of knowledge vendor was a fluke or an easter-egg for early adopters. As far as I know, you still have to research color shift and the AE mez.

Keep an eye out for them in the bazaar if you don't want to invest in research, but don't over-pay. I've seen some hooligans charging 200 platinum for them, but 20 seems to be closer to the going price.

Although it's unlikely, if you happen to catch me around (A gnome called Brevis), I'll gladly do the research combine for you if you provide the ingredients.