04 05 zx10r swing arm pivot bot nuts????

Hi guys doing a zx10r 05 swingarm conversion on my zx7r p1 and need some spacers made, already have the plans but it has the specs for the 20mm flanged bolt and 30mm lock nut that go on either end of the pivot bolt, any one got a 04/05 zx10r and able to measure there's so I can figure out if I need these made up or if stock items will work, also any one know what grade alloy I should have the spacers made in and where on the central coast I can have it done that wont cost me the earth. Thanks guys