Check with Indian Jewelry Supply
Visit the local metal scrap yard.
You would be surprised at what treasures
can be found there.
I got some square copper wire when taking
an automobile started apart for the wire.
YUK! You can draw it if your strong and have
good draw plate and big muscles.
Also check the local hobby shop where they
sell model train/ airplane kits and such.
I buy copper and brass tubing there for less than
I can make it (by far). Never saw any silver
tubing there though. So I do make that as needed.