The Katz cap mentioned in the post below will be reproduced by Ebbets Field Flannels. I had sent the cap along with others to the EFF headquarters to be documented for their archives.
This was confirmed by EFF via their Facebook page on July 24th. They posted a picture of my Katz cap along with the caption "Kansas City Katz amateur team cap sent to us by our good friend Paul Carr. Soon to be available from EFF!".
EFF head honcho Jerry Cohen told me the caps will be available in the next couple of months with their next "rotation" of caps. Stay posted here for an update on when they'll be available as well as ebbets.com and the Ebbets Field Flannels Facebook page.
I have more posts in the works!