Magneto Brand and Model are on magneto plate. Magneto was made by an outside vendor for
Kiekhaefer Corporation (Mercury). Wizard WD3 was made by Kiekhaefer for Wester Auto and
is very similar to Mercury KD3. Both were 1946 models. Due to consumer demand and supplier uncertainties Kiekhaefer used old stock parts at times.
Once you have identified the brand and model of magneto please post it here.
There are several options to be considered.