I’ve seen some TMP Super 8 reels on Ebay, but can’t recall their length. Collectors often spliced shorter cut downs together though.
JEDIT:Found three reels in Spanish
http://www.ebay.com/itm/STAR-TREK-SUPER-8-FILM-SPANISH-3-X-120-MTS-RARE-/182566067017
This thread might be better suited to the other preservations forum.