Check out http://www.fspilotshop.com/product_info.php?products_id=986. ; It is a payware Jetstream 41 for FS2004, but the model looks great.  It is loaded with features.  It may or may not be beta version of the payware one, but the Jetstream 41 here on page http://www.simviation.com/fs2004props123.htm is also very nice.  There are also freeware Jetstream 31s here http://www.simviation.com/fs2004props148.htm with repaints on other pages.  I hope this helps.