Sounds to me like I would find two large boxes and send both speakers straight to Bill at GPA.
He won't fix what is not broke but he can make right what is wrong.
Great info above and I fully agree that this should be done in pairs so both are the same in every possible respect.
Maybe I am wrong here but when it comes to Altec, I prefer having the experts do the work and avoid all others if I can't do it myself.
Those woofers would be in boxes and headed for GPA for the attention they deserve.
A friend had his altecs reconed at a place in California. He saved about $50 but when he sold them freshly reconed he got about $200 less then if they had been done at GPA.
There is something to be said about doing it right the first time!