You can ask Joe at Joes_Garage. Go to the following website and send him an e-mail
http://home.cfl.rr.com/limeyland/ . Joe is into restoring Triumph, BSA & Norton. If he doesn't have the engine he probably knows where you can get one. One thing about Joe is that he likes restoring the bikes to original factory condition. He isn't into modifying the bikes. This is a side business for him not his regular day job, so be patient.
Tom
