the only way to lower the back is with a shorter shock or shorter spring as the swingarm gets in the way to just insert a lowering ring on the bottom.
the front can be either dropping the yokes down the forks or shorter springs.
you should be able to get the standard Ducati spring kit for the Low model but you'll need the Low model side and centre stands too.
Just an update for you guy's. The T-Rex Lowering Link Will not work on the Hyperstrada.
It rubs the remote reservoir and the Gas Tank... Not good. I talked to them and they are going to try and make a new design that will fit.