Was the original issue a rotted surround or was the coil shot too?
I'm trying to break free the rock solid glue at the triple joint right now. I HAVE to get that apart, because I have to re-use both the VRC, as well as the cone/dustcap. Dustcaps are finally removed. But the spider is sandwiched between the VRC collar and the cone itself, so that needs to come apart, or the whole operation is bust.on the baskets?
I've tried debonder that is supposed to break down the CA glue used in speakers. No luck. That is why I resorted to grinding off everything off the former.
IMHO, if you really really tried, you can find/modify a cone to avoid the extra work of removing the old one. Can you measure how deep the cone is? (aka: cone height)
Edit: I take some of my advice back. Since that pole piece is not vented, the VRC or something similar must be used to vent out the heat.