Speedy metals
http://www.speedymetals.com/pc-1625-8232-1-14-rd-1045-turned-ground-polished-000-001.aspx
You may have a local metal house that has this. I'd check around. I ordered online as the closest for me was over 100 miles away.
You want a turned, ground and polished solid bar. I use a 1.25" with the mandrels I have. Works great.
