Less than a week of ordering
And I have a well-wrapped parcel of '83 GSX750 bits. A week might not be quick to someone living in the UK or US, but living out here in Oz that's pretty damn good. And they're based in Britain!
World's End Motorcycles supply parts for all bikes including the ones fast turning into "classics". Holding the hard to get stuff that keeps you mobile, such as brake caliper and master cylinder repair kits, fork stanchions through to gasket sets, camchains, sprockets and... it goes on. Their easy to use website lets you choose between pattern and genuine parts too.
So when your local bike shop isn't interested in something over ten years old, and you need parts quickly, but you don't want to pay the earth for them, try www.wemoto.com
(Quick post, but needed mentioning.)