As a long time Alon/Nola owner including the Alon 1, I wanted to add that as mentioned your best option to retain the famed Alon 1 bass slam and balance is to get the woofers rebuilt/reconed by Miller Sound. In fact I'm fairly certain that Carl uses Miller Sound for his driver rebuild services. Here is the link for Miller Sound:
http://www.millersound.net/service.htm
I have had 2 sets of woofers rebuilt by Miller Sound, one set for my Alon 1's and one set for my Alon Lotus SE mk ll's and both times the quality of rebuild and turn around time were absolutely first rate.
Cheers