I can provide a set of early or late model (I have both) 40mm Solex sidedraughts. They will be fully rebuilt and cleaned. I can set them up with jetting to suit your planned state of engine tune. I can also provide a cable throttle kit.
The Carbies $600. Throttle cable kit $120. Plus any postage.
This will include support and supply of other jetting when or if required.
I have also got a set of 44mm Mikuni/Solex for $660.
Both sets will bolt to the 18R-G manifold, but I do not have a manifold at present.
I am in Canberra and I'll have pictures up soon in the For Sale forum.