I know the 1993-1998 Supra stock coilovers work for the 1992 SC's so I would think it is safe to say any Supra aftermarket coilovers would fit as well on our SC's..
I installed EIbach springs and tokimo shocks that were made for the Supra and they worked just fine on my 1992 SC400 which is going on for over two years now....