Nice find.Interesting, you can buy any of these parts off of Rakuten in Japan:
So the price for the "new" 28100-60070 of the GR program is of 750$/€... That matches the price of the one still listed available on Amayama (and Europe equivalent) since long before this program...
When you compare it to the price of the reman 28100-60070-84 this is really a joke... but the -84 parts are only available in the US for some reason.