Where can I buy M18, 1.5mm pitch bolt(Melbourne)?

[dom14]

Pricey bolt, some on ebay for circa $18 - 23 each. How long do you need, might have one here?

1cm-1.5cm should be enough for me.
Ebay ones are stainless steel, which is ideal for my application(exhaust O2 bung), but can't wait.
If you've gota one to spare, let me know.
Cheers