Sprockett

I have a 1990 Celsior with the Piezo TEMS. This one is not like the Supra one with settings but rather a on/off mode and the car automatically controls the dampning based on speed. I would like replace the shock and Ideally keep the TEMS system. I know that the Tokico Illumina II's are supposedly compatible with the Supra TEMS system but can't see any listed from the LS. Does anyone know if there are aftermarket replacements for the LS400/Celsior?