For a long time it was very hard to find the right fork leg that you could mount the caliper bracket too.
There were only a few companies that were producing them and they had all ran out of stock.
I was fortunate to be in the right place at the right time when BRC found one in their warehouse and listed it on Yahoo Japan auctions with a buy it now price.
My dual disc setup cost me in the neighborhood of $3K. Sometimes you have to indulge a little and treat yourself.
I already had a dual disc setup on my cafe' bike that I was told was original HRC product, but I have no way of knowing if that is true or not. There was also an Italian company that offered the Right leg, I think I have a scan of their flyer somewhere.
A company in Kushiro, Hokkaido, Japan (Omote) who has been instrumental in reproducing some pretty trick parts for the 400F (Hayashi cast aluminum wheels for example) has just produced 200 sets of lower fork legs for dual disc set up. They are not cheap and he usually sells out before they are offered on the market. He also contracted with the original manufacturer of the 400F 4into1 exhaust to have a limited number of original exhaust manufactured. They will be stamped with a serial number.
Omote partners with SHIO, SCAN, AGAIN, MISTY, CUSTOM PARANOIA (CP), and AGAIN to distribute these products. So, if you follow any of these guys you will see when they become available and they are taking deposits. Be prepared to shell out some $$$.
