I'll keep holding my breath for the full uncut version of this (not really, it's likely already destroyed or sitting in Don Bluth's personal vault) but here's a first run VHS if someone wants to cap it for the one scene that for sure turned up on home video. Subsequent pressings and the DVD don't have the scene.
http://www.ebay.com/itm/Movie-VHS-The-Land-Before-Time-1988-/150985388817?pt=VHS&hash=item23276e3311