Stag V8 Lucas Petrol Injection Inlet Manifolds

How rare are these, I have never even seen a picture of these before let alone having seen them in flesh.

Triumph very early on in the Stag development program tried Lucas injection and these are orginal inlet manifolds from that period. Donated by Tony Luxton (ex Triumph experimental) we are indebted to him for saving such rare parts and giving them into the safe keeping of our museum. Now all we need is an eight cylinder metering unit (I know where there is few of those), and a Stag metering unit drive and mounting, any ideas?

Stag InletsStag Inlets