Mavimao said:

If one were looking for a high quality source, perhaps Laserdisk? Was the Mexican dub used for all of Latin America?

I'm just a gringo, but from what I've read, I believe that the Mexican dub (actually done in Los Angeles) was indeed used for all of Latin America.

As for high-quality sources: You'd think that the Latin American Spanish dubs would have been released on video...but you'd be wrong. From what I can gather, all of the pre-SE Latin American video releases were in English with Spanish subtitles. Why, I have no idea.