Great find on the JBL "repair" thread. Really good info. I did not know about that forum. I am not a Telecaster guy but who knows what other good info can be found out there.
I have had good luck with Philadelphia Sound Productions for repair work and sourcing of nice JBL D/K/E series speakers (plus a LOT of other good gear, new and used). Check them out right HERE. Their inventory changes frequently so check back often.