Hello Yuri, HRC parts are in very short supply but you could try the Japanese auctions as some bits turn up occasionally.

Try BUYEE.JP it is a bidding by proxy service that bids on Yahoo Auctions, there are charges for using it of course and shipping costs can be a bit steep depending on what it is you have bought, heavy or large items very expensive then there are import charges and possibly Tax to be paid.

I have found it very useful getting parts that I cannot get here.

DUX.