I have never come across one. I can't see them on the Yamaha NZ site either. There don't seem to be a huge number of the WR250R's in the country, so I guess if yamaha don't expect to sell many of those, they would expect to sell even fewer of the motard version.
As far as I am aware, they are basically the same as the WR250R (except for the wheels, obviously), so a motard conversion probably wouldn't be that hard. Yamaha sell the motard wheels, but there would probably be something else that fitted as well.
I am very pleased with my WR250R so far, I imagine the motard version would be a very cool bike.
The road to hell is paved...
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