You know Mel, I didn't think about these, but it is another option for overdrive, but it's only for four speeds or the NV4500, and its the only true underdrive outside of using a brownie.
LINKY
After talking to Jim today, he said that due to small design changes over the years (larger bearings resulting in slightly different cases, different gear pitch - 10* in the DN, 16* in the USG, and different input adapters) would make frankensteining two cases together a long shot at best. Hard parts from a DNe2 OD would be the only safe bet for converting my trans, and Jim said the last time he heard of anyone finding new hard parts for a DNe2 was over 15 years ago... He said, "You would have better luck searching for the grail."
Unless I get lucky and found another unit, I might as well save up for a ZF, GV, NV4500, or Ranger.