Espen , please contact Hans Isaksen (in Sortland ) and or Knut Einarsen or Bjorn Kvandal (here on this site), they are all in Norway and may be able to help you with Firebird info.....
If you want to contact them per email, send me an email to bsefeldt@mhinc.com and I`ll copy them on it in a return mail with your email,...