Where to buy company exclusive Plarail trains in Tokyo?

Exclusive Plarail trains are sold at the the station. If you visit the official Plarail site, it will tell you where you can purchase them. But bare in mind, the older they are, the harder they are to find.

I buy a lot of exclusive trains and they tend to cost a bit more than standard Plarail. But because the yen is so weak right now, it all works out if you buy it from Amazon Japan. The mark up is not always that bad.