On Fri, 7 Aug 2009 18:51:35 -0700 (PDT), "
wrote:

I need to get some 1/2" and 5/8" steel balls. They don't have to be
super high quality, but I do want them to be relatively inexpensive.
I need to get 50-100 of them.

It is for a game that uses them, not exactly home improvement. Well,
except for the joy of a game that finally works...

Wouldn't it be easier to wear a cup? :-)

This place has plain steel or stainless, and many other materials too:

www.smallparts.com

HTH,

Paul F.