No need for a half round drawplate, ever. If you have a round
drawplate, just put two pieces of wire together and pull. Voila, half
round. Want quarter round? Put 4 wires together and pull.
There is a very clear example of this in my book, Professional
Goldsmithing, in the carved ring project. I made a half round band
from a piece of round wire.
Revere Academy of Jewelry Arts, Inc.
760 Market Street
San Francisco, California 94102