I have seen some interesting pendants in Germany made with lampworked
glass beads and assembled on a threaded rod with screw on bails and
end caps.

Does anyone know a findings shop or materials supplier that sells
these specific type of components that one can them make up with one's
own beads ?

I have spent hours on the web and have been able to find normal bails
and end caps but not threaded ones.

Any help would be appreciated?