I hope it is OK to copy from another forum, but this is straight from Wayne:
"Short answer, no. There is no drop-in replacement that is as good.
If you're in a hurry, I might suggest looking for used 2226 drivers. One of the nice things about JBL is a reconed speaker is 100% as good as new, provided you use a genuine OEM recone kit.
The driver that is closest in performance and quality is probably the Acoustic Elegance TD15M, which is an excellent part. But it would require a crossover redesign, as has been discussed here in the past. It isn't a drop-in replacement for the JBL 2226 in the four π loudspeaker and the lead time is no better, so I'm not really on board with taking that approach."
The answer was 2 clicks away. Thank you everyone for your input and suggestions.