[Source] Silver cinch or channel setting

I am Lapidary Hobbyist, looking for a means to set some of my
Freeform Cabochons in easy to construct settings.

I have basic soldering skills and enough basic equipment to carry
out the work, I have been looking for a ready-made silver section
which could be used in making Cinch settings or similar.

Can anyone help in pointing me in the right direction to where I
could source the metal

Best regards