MLA - your a WS retailer. He's a WS consumer. Thats the difference. I don't think there is any miss communication. I believe Ken is the National Sales manager for WS. I'm sure he knows what he's talking about.
Typically Mfg's have service departments to repair that ford engine you spoke about. If you ask to buy parts they will say no. If you send the speaker in for service, I'd think they will fix the speaker, and charge you accordingly.
Maybe MLA can fix you up and order in your parts under his dealer umbrella. It would be a waste to buy new speakers over a single blown driver.. Suggest you have MLA run interference for you.
-Brian