Yes there is:
In the aircraft.cfg for each livery, search for the "ui_manufacturer =" line and add an asterisk after the = like this:
Default aircraft Before:
ui_manufacturer = "TT:AIRCRAFT.UI_MANUFACTURER" ; e.g. Boeing, Cessna
Default aircraft After:
ui_manufacturer = *"TT:AIRCRAFT.UI_MANUFACTURER" ; e.g. Boeing, Cessna
Add-on or Modded aircraft Before:
ui_manufacturer = "Diamond Aircraft" ; e.g. Boeing, Cessna
Add-on or Modded aircraft After:
ui_manufacturer = *"Diamond Aircraft" ; e.g. Boeing, Cessna