There are no electronically modulated coil over systems which work with the TEMS system. It would require an intermediary controller to be engineered and actuators meant for the new system... At which point it's not worth it. The system which comes with newer coilovers is more advanced and programmable in most cases and the cost will be comparable.
As for body roll, lower the car will help only if the current suspension is soft (which, granted, it probably is). Beefier swap bars and replacing worn out suspension bushing is probably going to make bigger difference. Just come food for thought.
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