All keys from early days will fit they are cheap
also all keys were made by Briggs and Stratton who made
door locks and IGNITION . switches for GM if you get the number off the cylinder you can have original one cut to fit your switch . or find a bunch of old keys for GM one of them will turn your IGNITION switch
https://www.ebay.com/itm/4-GM-OEM-KE.../372302150616?