[gregb]

Re-coning isn't that hard, the hard parts is getting the right parts. Kenny Richmond re-coned a speaker on a radio I bought from him and it had a really nice cone with the nice cloth surround instead of the foam one that causes fitment problems. Last time I spoke to him about it he was trying to get a line on a good supply of them so he could offer them for sale.
If you want to try the foam surround cone they are available on the web and they are dirt cheap.

Gregb