i have some of those on my own car in 19", but not with the charcoal center. i had to bring mine in new from a retailer. so many dramas trying to get a set in at a good price.
for the Racing Hart range, the best people to deal with is Croydon Racing Developments in Silverwater NSW. Jim or Lance will be able to help. From memory, they worked out to be $920 per rim, no tyres.
These wheels wont be available on Jap auctions unfortunately.