At the last Intergem Show, a vendor called Rita's Sterling had
almost all of these (I didn't see any ball chain, but that doesn't
mean they don't have it.
Rita's Sterling Inc.
9820 Concord Downs Avenue.
Las Vegas, Nevada.
They don't seem to have a Web site, and they seem to only sell at
shows. I thought their prices were quite reasonable. One caveat: I
bought some cables from them that they said were 16", but when I got
them home, they were 15". Now, I measure everything that I buy from
them because they are always on the road, English is not their first
language, and I couldn't get anybody to understand the problem in
order to make an exchange.