I have a 43D distributor and looking back through my records found DCB104C and DSB108C, I think they are Lucas part numbers. I now have Magnetronic ignition.
Bjorn-Anders,
For the distributor of my S3, I once used distributordoctor.com. It’s in the UK. I had my distibutor refurbished. Very good job. They also have parts.
Olivier.