Angus242164
Are you looking for an electronic system that allows the base timing setting to be adjusted?
If so your best options are probably the Bosch "breakerless" system from B21E's and B23E's, or the more modern Bosch system from B230E's, I think it was called TZS9, it's similar but has a hall effect sensor instead of magnetic, and a more compact, more modern module.
I think I have both complete setups here, send me a PM if you want me to check and confirm.