Hans was good enough to send me these over recently with a box of springs and bits.
They are absolutely jiggered and have no business going anywhere near a road going vehicle. I understand from Hans that AVO take old units to either rebuild or give a discount against replacement units and this is the basis on which these are offered. They come complete with upper spring retainers. The damping rate is adjustable but the spring platform is fixed.
Free to anyone who wants them, pick up isn't a problem though I am in Devon (I'll be at the Exeter Kit Car Show tomorrow) or cover the cost of postage wherever you want them sending. For reference they should weigh around 5kg packed.