i dont think anyone has tried it.
i dont think anyone is going to just buy one and "see" if it will fit, and figure something out later if it doesnt fit.
things like that, you really dont know till you take a measurement, study the curvage, unless someone has done it already or we know for sure for a fact that trunk lid piece is similar in two cars. (like the prev. gen tl spoiler on dre's car)
however, last time when i had mugen spoiler, i tried it on tsx. 6thgen's trunk lid is wider and longer (side to side) than one on tsx. if you're asking if tsx spoiler uses 6thgen's spoiler hole? then no.
if you can make it fit? yes, you just have to drill a hole closer to center (i dont know how far from stock hole)
would it look good? i dont know