Just an update really as I got an email back today from Eibach UK.
They are currently testing Roc R specific lowering springs.
No release date at the mo but have been told to re contact them in a months time for further updates.
How much it lowers wasn't available either so presume they're playing with heights along with spring rates as part of their comprehensive testing program before mass market release.
So there you have it.
VWR (KW) and H&R are the only options at the moment. But Eibach hopefully will be available by end of the year perhaps.
I'm gonna wait till the Eibachs are released before choosing which to go for!