Here are several links to posts on the club board I made last year showing several hundred of my favorites.

Modified Brass Cores.
http://www.ccgtcc.com/cgi-bin/bbs521/webbbs_config.pl/md/read/id/57037/sbj/modified-brass-cores-one-of-a-kinds/

Reliable Made Samples
http://www.ccgtcc.com/cgi-bin/bbs521/webbbs_config.pl/md/read/id/57017/sbj/a-few-more-reliable-samples/

http://www.ccgtcc.com/cgi-bin/bbs521/webbbs_config.pl/md/read/id/57016/sbj/ex-favorite-of-the-week-brass-cores-week-10/