Did you try changing the ECU? I always have one or two good ones around for situations like this. Ditto for coils. The only thing that can really go bad in the distributor is the pickup with that plug coming off it, whcih you can you replace.

It's not a very complicated system, I wouldn't bother changing to points. That's like throwing out the tv remote and getting up to change the channel because you don't want to change the batteries.