I too would like to know.
I found a place in Japan that carries all sorts of authenticJDM Mitsu & Ralliart stuff. Only problem is that everything's in Japanese. I contacted them once. Their English is very elementary and communication is not easy, but as I understand it they have no problem exporting to the USA. In fact I think these are the guys that sold Reelax his Nifty-R bumper.
http://www.sigma-speed.co.jp/index2.html
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