I've just taken the Nitrons off the car. I'm back on the Bilsteins for a while, as something more comfy suits me better at the mo.
So, I have a set of Nitrons in the garage - they're one-way adjustable. They're about 5 years old and have no damage, but they haven't been maintained in that time so they definitely need a refurb before using again. Eibach springs are on them - can't remember the spring rates off hand but they're 50 pounds softer front and rear than Eliseparts recommend (which was a good compromise for me for mostly road and occasional track use).
I might just hang on to them, but would sell for the right price. I don't have a price in mind - but if you're interested PM me and let's see if we can sort something.
Cheers
Tim