Wrong answer John!!!!
Pro parts....not consumer. There is much overlap with pro and consumer with the vintage products.
I had a call into Pro customer service on the availability of driver throats for the old alnico drivers...for you, as a matter of fact...and guess what? They're not always available....and answers to their availability often go either unanswered or unknown. Some parts aren't available outside the factory, either....it's known as "FSO" or "Factory Service Only".
I still don't have the answer for you. Dave Wheeler in Pro customer service is a very busy guy...and very patient with regards to his resources. His answers are often times at the mercy of engineering, purchasing, management, etc.
JBL Pro Customer Service isn't interested in supplying Canadians with free parts.
I hope your sense of humor is engaged today.