[Source] Solid brass spacer beads

Can anyone direct me to a supplier of solid brass spacer beads of the
type often called “Bali” beads? They are flattish, small, with a row
of little knobs all around the edge. I can find them in brass-plated
pewter, but I don’t like to use plated metal at all (the plating only
wears off, leaving an ugly grey look). I’ve tried some of the usual
sources (Rio; IJS; Bead Monkey, etc.) without any luck.

TIA
Judy Bjorkman