there was NEVER a 930 Turbo LE...
there was the 930 Turbo with the factory optional engine upgrade..
LE means Leistungssteigerung (uprating)
The factory kit was avaible as option for all 930Turbo ..order code was SOW 020
SOW = Sonderwunschprogram (special wish program) it was renamed in 1986 into Porsche Exclusive
The option SOW 020 was the engine upgrade to 330hp for the 3.3l Turbo engine Type 930/60 with 4pipe exhust.
SOW 020 was only avaible together with SOW 021 OR SOW 022
SOW 021 = CFK front spoiler incl extra oilcooler
SOW 022 = standart front spoiler with extra oil cooler, fog lamps deleted
The SOW 020 option was sold from 1985 till 1987