Good question and hard to answer. Some ARFs have the distributor's name like AeroWorks stamped into the wood inside the fuse, most don't though. If you search around you can find ARFs with the same specs/sizes as your plane and be pretty sure there parts will work for you. Most of these planes will be in what they are calling the 50cc size. I have a few glass cowls on hand but the only one I have for a YAK or Sukhoi is for a 40% plane. You can also give Fiberglass specialties a call and give him the circumference of the fuse you need it for. Maybe he has something in stock??