Hi, Marc, here are some sources online that you could take a look at and see what's out there:
Hobby Bunker, Malden MA:
http://www.hobbybunker.com/categorylist.cfm?body=mfg&ID=165
Chuck Robinson's store, Red Lancer, Milton PA:
http://www.redlancers.com/subcatout.asp?mfg=224&page=3
As mentioned in the earlier post, Michigan Toy Soldier Company:
http://www.michtoy.com/MTSCnewSite/12_action_figs_folder/12action.html
Here's the link for the 1/6 index at Bad Cat Toys:
http://www.badcataviation.com/16scmiacfi.html
That'll get you started. If you google, "1/6 scale figures", too, you'll get a list of sources. Many dealers who sell miniatures or toy soldiers also carry the large-scale figures, and if there are any toy soldier or military/historical miniatures shows in your area, it's worth it to visit them. Besides seeing some great modeling work, there is bound to be a dealer who has some figures on his table.
Hope that helps!
Brad