I just got the parts kit in the mail today, this is what you get...the picture with the side plates and breech face shows some spacers for use when welding the breech face to the side plates. I found these in a hardware store and 1/4" keyways seem to be the same thickness as the main spacer between the grips.
http://i1359.photobucket.com/albums/...ps6242f9d6.jpg
http://i1359.photobucket.com/albums/...ps9ea55cfd.jpg
http://i1359.photobucket.com/albums/...ps8608e06a.jpg