I know its wasteful, but you can always drill out round wire to make
For small production run I would use solid 2mm rose gold wire and
then drillit out after center punching it. Quicker then searching
for tubing and no left over tubing laying around.
Panama Bay Jewelers
Hoover and strong. Great variety
Why not just draw some out? You’d have the best control over
diameter and wall thickness that way.
Also wasteful perhaps but could you hack an earring? Rio Grande sells some rose gold hoop earrings made of tubing.
Stuller has it. They also have rose gold tube settings.