I have had a quote for about $250 from Powerspark for a 43D with the correct advance curve. I sent them the advance curve details from my workshop manual (below) and my camshaft spec, and they came back with this :-
Has anyone (apart from ChrisNo advance below 450rpm, 8 degrees at 900rpm, max advance of 10 degrees at 1800 rpm (all measured at the distributor) It's based on a 43D non vac with electronic ignition, rotor arm and top entry cap and will work with a 3.0 Ohm coil