Try any of the actual refiner/producers, not just a dealer. None of
the companies you mentioned are actual producers. Try instead,
Hoover and Strong, or David H. Fell, or Hauser and Miller, Ross
metals, United Precious Metals, or if you need enough of it, Handy
and Harmon. And those are just the first few that come to mind.
there are more. These people could, if they don't already have it in
stock, produce it. They're not waiting for someone else to deliver
it to them, so they can ship it to you. If they don't have it in
stock, there might still be a time delay for production, but several
of these companies will bend over backwards to help you if you need.
David Fell, in particular, has always seemed especially tuned to the
needs of craftspeople, but so are Hauser and Miller, United, and
Hoover and Strong...