I heard there is a japanese company that has them on a
Very fast four wheeler horse and cart ? But it's just a rumour that no one can verify !
Lol . No man iv never seen them in 15s but they might
Be out there , Mugen might have put them on there mugen
Crz ?
A quick search came up with these: http://kingofrims.com.my/product/new-15-inch-8-spoke-sport-rim/
... they don't look to be authentic though. No Mugen logo and the center cap blue is way off.
Other than that all I could find were 16", and that seems to be all that was offered: