.22cal brownie derringer mossberg

Question
where can I go on the internet to find parts like extractor rod,grips...?

Answer
Hello Rocky White.
  You have a neat little pistol there. It was manufactured sometime between 1919 and 1932. The internet is an amazing tool, but it is lacking in parts for a Mossberg Brownie. However, there is the Mossberg Collector's Association, dedicated to Mossberg firearms. You might give them a try at www.havlinsales.com.
  A word of caution. The metals used in these were not of great quality, therefore, I would not fire anything more than a .22 short cartridge in it.
  I hope this helps. Please rate my performance.