I trying to restore 2 Mercury Mark 20’s (serial #’s 750428 and 700054). Where can I find replacement parts for the ignitions? Condenser part # 399-123; coil # 399-125; and points #399-121A: and insulators # 399-129. I’m getting frustrated trying to locate these parts, but being tenacious, I continue my search. I’m having a ball so far. These are my first restorations on my own. Motors are in great shape, but I’m afraid coils are KAPUT, so might as well replace all. Thanks for any help