http://www.amazon.com/Aisin-WPM-012-...ywords=wpm+012
via Amazon. Part numbers are matching and Aisin is the original Mitsu supplier. Rock Auto has it for slightly cheaper, but when you toss in free shipping from Amazon, it works out. Thanks to the guys over at galantvr4.org for doing the footwork; definitely beats the $150+ for a new one from Mitsu....
Thread here:
http://www.galantvr4.org/ubbthreads/..._Forums&Words=