OK, I believe I found the answer.
SuperSprings
As I read it, I believe Kev must have SuperSprings or SuperSway-Stops made by same company that makes SumoSprings.
Here is what they make:
SUMOSPRINGS – the world’s first airless airbags
SUPERSPRINGS – the unique, self adjusting leaf spring suspension enhancers
COIL SUMOSPRINGS – the easily installed answer to boosting your front or rear coil springs suspension
SUPERSWAY-STOPS – the simple solution to reducing camper body-roll
SUPERCOILS – the heavy duty, replacement front end coil springs
Ken
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