Hi there,
I wouldn't say its an easy process to get to the HDD in the R35 and once that part is done, that person would either need to send me the HDD or know how to unlock it to get to the firmware (could help with that part)
A member on another forum kindly shared the American firmware, so all we need is the Japanese firmware to get things underway.
Apparently was a conflict of interest for the moderators on that site for us to create a conversion they are only delaying the inevitable
P.S. Apologies for the delay on this reply, I wasn't signed up for notifications on this thread...