once you have the part code in Fast you need to return to the main menu and look up the part number (press F5). But if you spoke to Nissan parts and they didn't tell you that, they didn't want your money.....
interestingly I've never had to change that bush on the race car.
BTW full part number seems to be 56219-24U01, well for series 3 r33 gtr at least, US$12.43 from amayama via japan