Not to my knowledge. Front and rear 'locking' differentials were the only option that I know of for the 80 series.
When you move up to the 100 series (U.S. Market) then the Land Cruisers (98-99) had a locking rear diff option and the same year model LX470's came standard with a Limited Slip Differential. No factory options for a traction aiding device in either front differential for those year models. Year 2000 and beyond have the ATRAC system.