What about that very low mileage A1 on Ebay? It is a KZ, though it has Z badges. Asking £9500, but open to sensible offers. Largely original condition too. You'd have to wait a long time to find another as good as that, I think.
that one does look quite good. Needs a seat cover but apart from that it seems a pretty sound bike. Should also benefit from tax/mot exemption.
What are your views on carb versus injection?