That looks like a standard Magnatron coil, as used on nearly all Briggs engines since 1983. All you need is a dead Briggs engine, or alternatively you can buy one. Because a lot of pre-1983 Briggs engines are converted to Magnatron, the units are not as commonly available as you might hope, but they are quite widespread. I'd have thought the Wanted forum would have been a better choice, but you should achieve a reasonable exposure to members this way.
