http://biggdawgtumblers.com/5601.html
Look here for larger capacity tumblers for use with Stainless Steel pins. A little expensive, but worth it if you don't want to build your own and want to do large quantities at once.
Daddycat,
The one that were really oxidized range pick ups will continue to get brighter and will eventually shine like new the more cycles they go through the SS tumbling. I have some that was totally black that are shiney bright brass now.