I do not know if they ever released all of the episodes in the u.s.a. in ntsc,
but in the u.k. there are a boat load of tapes they are pal of course and hard to track down.
But the pal source would be of better preservation quality, only if you want to be free of pal speedup you would have to fix it afterwords.
Unless of course the word could go out to people who might have taped them on high quality beta, in ntsc.
They showed them on cartoon network once upon a time, don't know if they made changes.
I too wish there was a complete official collection of the nelvana animated stuff, including the animated boba fett cartoon from the holiday special.
The one tape i have seen from u.k. ebay sellers is pirates and the prince original episodes, and the great heep the droids movie.