NGK sells wire splicers which allow you to snip off most of the old cracked wires (assuming they're not cracked all the way to the coils) and add in new high tension wire to the caps and then the plugs. If I remember correctly there was a post about this subject you could do a search for.
I bought some splicers but never used them after solving my problem by cutting a 1/4" off of the end of my #4 wire to reconnect it to the cap. I'm savingn them for a rainy day cause I haven't got much slack in my #4 wire anymore. (just enough

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If you need to get new coils, you may be able to pick some up used on e-bay or even loudfastandugly.com in their grab bag of parts. . The consensu seams to be they don't go bad easily, except for the wires cracking, I guess.
peace,
jason