Hi, I honestly don't know what was used on that but I think back then the drivers came out of the far east. I would suggest something like jb weld , it will get the job done. There are tutorials on youtube about how to center the voice coil when the cone is replace, I believe they use a 50hz sine wave. I think that would be the biggest challenge. There wont be an issue with using the other driver. When Axiom uses 2 driver in a speaker they use 2 drivers in series that are 4ohm's each and since both your speakers are single drivers you will be fine.
