Check out the main Ambush Alley website www.ambushalleygames.com they have a nice selection of minature companys for 15mm,20mm,25-28mm. Just click on resources then minatures on the left hand side. A nice list of companys comes and should you need anymore help just post on the Ambush Alley Fourm, The Guild (
http://www.guildwargamers.com/) without brakets.
Great game isn't it and we are so spoiled for choices =o]