Try Megatech. You will have to send them an e-mail, because they don't list any replacement parts on thier site.

http://www.megatech.com/product_deta...ft.php?ID=9936

However... after reading the info on this model... (I assume its the same one) It is probably not a good choice as your first airplane. Mustangs are notoriously bad for beginners. This one does not sound like they tamed it enough to be a primary trainer.