The man who never seems to sleep, Stefan Wirz, has several new work-in-progress discographies at his site. One is Sam Collins where he's undertaken the herculean task of listing out all the different, pseudonymous Gennett "dime store" releases ("35 cents each or three for a dollar").
http://www.wirz.de/music/collins.htm
http://www.wirz.de/music/collins.htm