Been meaning to post this. I went ahead and fabricated a very basic replacement ignition coil bracket from some scrap aluminum angle I had in the hanger. But, before installing it a friend at the airport dropped by, who has a machine shop and also an amazing basement workshop, and insisted that we fabricate a more durable replacement out of 4140 steel that would be less prone to break again. I shot this short video for our EAA chapter (we're going to visit his basement in a few months). He added a third side to the bracket to strengthen it, but (not in the video) I needed to remove much of that in order to be able to get a small wrench in there to reinstall the bracket on the engine. Those of you have have had to make this repair know how tight it is in there.
Over engineered. YES. But was really interesting to see a skilled machinist in action. After weeks of maintenance in abnormally cold spring weather, several SBs, and this last repair, the annual inspection that wouldn't end is finally done...
P.S. if you check Lockwood's website, the replacement bracket (# 851260) can be purchased for something like $11 (surprisingly cheap compared to most Rotax part prices). So if this one fails, I'm obviously just going to buy the next one.